每日一词：hark back（转自 韦氏词典）

Merriam-Webster’s Word of the Day for December 31, 2018 is:

hark back • \HAHRK-BAK\  • verb

1 : to turn back to an earlier topic or circumstance

2 : to go back to something as an origin or source

Examples:

“In Tea With The Dames, [Maggie Smith is] joined by fellow dames Judi Dench, Joan Plowright, and Eileen Atkins; the women hark back on their early roles on stage and screen, talk about their ex-husbands and marriages….” — Hunter Harris, The New York Magazine, 26 Sept. 2018

“To stay connected with senior executives, she made heavy use of WhatsApp’s group-chat function and called her group Table Talk, an effort to hark back to those early days at her kitchen table.” — Sarah Ellison, Vanity Fair, March 2018

Did you know?

Hark, a very old word meaning “to listen,” was used as a cry in hunting. The master of the hunt might cry “Hark! Forward!” or “Hark! Back!” The cries became set phrases, both as nouns and verbs. Thus, a “hark back” was a retracing of a route by dogs and hunters, and to “hark back” was to turn back along the path. From its use in hunting, the verb soon acquired its current figurative meanings. In time, the variants “hearken back” and “harken back” were called, and—like harkhearken and harken can mean “to listen.” Harken, itself, is now used alone to mean “hark back.”

Lake桑

December 31, 2018 at 01:00PM

新版编辑器的测试。Testing the new block editor.

With the computer, you can read two versions of the passage simultaneously.

新版编辑器的测试。

LaTeX 不支持中文，所以没有办法比较。

Lake桑

2018.12.31

Testing the new block editor.

I speak English.

This is an article that is written in both Chinese and English.

With the new block editor, I can write an article in both English and Chinese.

By using the tag <div> and its style, we can divide a page into 2 columns, just like the exam papers.

This can also show the verbosity of English.

The contents in 2 columns are not all the same. There are some slight differences between the columns.

Except for the medias.

LaTeX doesn’t support Chinese, so there isn’t a way to compare.

The hyperlinks should be the same.

Aren’t they?

Now we’re aligned.

The longer content it is, the more unaligned it gets.

I don’t thnik it’s a god tinhg.

By using adverbial phrases, the whole sentence will get longer for sure.

It’s supposed to be unaligned.

But the new block editor makes it possible to do that, see?

L.

2018.12.31

一周年。

WordPress 在一年里，出了一个 Gutenberg 编辑器。

Lake桑

2018.12.31

每日一词：obdurate（转自 韦氏词典）

Merriam-Webster’s Word of the Day for December 30, 2018 is:

1 a : stubbornly persistent in wrongdoing

b : hardened in feelings

2 : resistant to persuasion or softening influences

Examples:

Obdurate lawmakers on both sides of the aisle have made it difficult for the state legislature to get anything done this term.

“The emigrants were strong-willed and obdurate. Their dreams were based as much on imagination as on the writings and maps of land speculators and entrepreneurs.” — Edward Cuddihy, The Buffalo (New York) News, 1 Oct. 2017

Did you know?

When you are confronted with someone obdurate, you may end up feeling dour. During the encounter, you may find that you need to be durable to keep your sanity intact. Maybe you will find such situations less stressful in the future if you can face them knowing that the words obdurate, dour, and durable are etymological kissing cousins. All of those words trace back to the Latin adjective durus, which means “hard.” This adjective can still be found in dura mater, the name for the tough fibrous material that surrounds the brain and spinal cord, which comes from a Medieval Latin phrase meaning, literally, “hard mother.”

Lake桑

December 30, 2018 at 01:00PM

TL;DR

二、学生测定空气成分

现象

$\rm P+O_2 \overset{Fire}{\longrightarrow} P_2O_5$

• 污染小
• 误差小

Lake桑

2018.12.30

化学相关：走进化学实验室

……用手轻轻地在瓶口扇动，使极少量的气体飘进鼻孔……

一、对蜡烛及其燃烧的探究

 探究步骤 对现象的观察和描述 点燃前 燃着时 熄灭后

 步骤和方法 现象 分析 1、将石蜡…… 石蜡在水中…… 石蜡的密度…… …… …… ……

实验室化学药品取用规则

1. 不能用手接触药品，也不可把鼻孔凑到容器口闻药品的气味，不可以尝任何药品的味道。
2. 注意节约药品。一般地，必须按照实验规定用量取用药品。若没有说明，按照最少量（即1～2 mL）取用液体，固体只需要盖满试管底部。
3. 剩余的药品不可放回原瓶，不可随意丢弃，不可拿出实验室，要放入指定的容器（比如废液缸）里。
4. 不要手抖。

3. 仪器

1、试管：用作少量试剂的反应容器，在常温或加热时使用。注意，加热后不能骤冷，防止炸裂。

2、烧杯：用作配制溶液和较大量溶剂的反应容器，在常温或加热时使用。加热时，应放置在石棉网上，使受热均匀。

3、量筒：量度液体体积。注意，不能加热，不能作反应容器。

4、集气瓶：用于收集或贮存少量气体。可以用做部分反应的反应容器。

5、酒精灯：用于加热。注意：用完酒精灯后，必须用灯帽盖灭，不可用嘴去吹；绝对禁止向燃着的酒精灯里添加酒精，以免失火，绝对禁止用酒精灯引燃另一只酒精灯。高温可以使用灯罩达到目的。

6、试管夹：用于夹持试管。

7、玻璃棒：用于搅拌或转移液体时引流。

8、胶头滴管：用于吸取和滴加少量液体，用过后应立即洗净，再去吸引其他药品。

9、滴瓶：用于盛放液体药品。滴瓶上配套使用的滴管不用清洗。

10、铁架台：用于固定和支持各种仪器，一般常用于过滤、加热等实验操作。

11、水槽：用于排水法收集气体、或用来盛大量水的仪器，不可加热。

12、燃烧匙：燃烧匙由铁丝和铜质小勺铆合而成。用于盛放可燃性固体物质作燃 烧试验，特别是物质在气 体中的燃烧反应。

13、托盘天平：用于称量药品的质量。如何秤量与物理相反。

14、平底烧瓶圆底烧瓶：常用作反应容器。

15、锥形瓶：常作为反应容器。

16、带导管的橡皮塞：一般在制取气体时连接发生装置和收集装置。

17、广口瓶：一般用于实验室盛放固体药品。

18、细口瓶：一般用于实验室盛放液体药品。

19、蒸发皿：通常用于溶液的浓缩或蒸干。

20、漏斗：用于向试管、酒精灯等添加液体。有普通漏斗、分液漏斗（可以控制流速）和长颈漏斗

4. 给物质加热

1、 酒精灯内的酒精，量不得少于四分之一，不得多于三分之二。

2、不用时盖上灯帽，以防酒精挥发点不着。

3、加热液体：

• 试管外壁要干燥。试管内液体不超过试管容积的三分之一。
• 试管夹应从试管底部套上取下，夹持在其上方约三分之一处。
• 加热时要先使试管均匀受热（预热），然后固定用外焰加热。
• 试管口要对着没人的地方。
• 加热后的试管需要等待其冷却后，方可接触冷水或清洗。

4、加热固体时，试管口要微微向下，防止试管口冷凝水回流炸裂试管。

5. 连接仪器装置

1. 将玻璃管插入有孔的橡皮塞时，先将玻璃管口用水润湿，对准橡胶塞上的孔稍稍用力转动插入即可。
2. 连接玻璃管和胶皮管时也需要先把玻璃管口用水润湿，然后稍稍用力，把玻璃管插入胶皮管。
3. 在容器口塞橡胶塞时，应该把橡胶塞慢慢转动着塞进容器口，千万不可以把容器放在桌子上再使劲塞进塞子，以免压破容器。
4. 检查装置的气密性，一般有以下的一种通法。先将导管放入水中，用手紧握试管，观察导管口有没有气泡冒出。如果有气泡冒出这说明装置不漏气，但如果没有气泡冒出，你需要仔细的查找原因，比如说是否应该塞紧或更换橡胶塞。直到不漏气以后才可以进行实验。

Lake桑

2018.12.29

每日一词：fulcrum（转自 韦氏词典）

Merriam-Webster’s Word of the Day for December 29, 2018 is:

fulcrum • \FULL-krum\  • noun

1 a : prop; specifically : the support about which a lever turns

b : one that supplies capability for action

2 : a part of an animal that serves as a hinge or support

Examples:

“Normally, bending involves using the hip as a fulcrum, and erector spinae muscles to support our trunk. When Jackson leaned over, he transferred the fulcrum to the ankle, with the calf and Achilles tendon under strain.” — Jake Rossen, Mental Floss, 22 May 2018

“In 2014, then-Attorney General Greg Abbott issued a nonbinding opinion advising that bag bans are legal if they are not aimed at ‘solid waste management.’ That murky phrase, which appears in the Texas Health and Safety Code, has become the fulcrum for debate on the issue.” — Emma Platoff, The Texas Tribune, 22 June 2018

Did you know?

Fulcrum, a word that means “bedpost” in Latin, derives from the verb fulcire, which means “to prop.” When the word fulcrum was used in the 17th century, it referred to the point on which a lever or similar device (such as the oar of a boat) is supported. It did not take long for the word to develop a figurative sense referring to something used as a spur or justification to support a certain action. In zoology, fulcrum can also refer to a part of an animal that serves as a hinge or support, such as the joint supporting a bird’s wing.

Lake桑

December 29, 2018 at 01:00PM

1. 性质是物质本身的属性。

$1013\, \mathrm{hPa}$ ，水的熔点是0 ℃。

Lake桑

2018.12.28

每日一词：canorous（转自 韦氏词典）

Merriam-Webster’s Word of the Day for December 28, 2018 is:

: pleasant sounding : melodious

Examples:

“His artistry, technical proficiency, and canorous melodies have an introspective yet uplifting feeling by virtue of the beauty and honesty that so naturally accompany the acoustic guitar.” — Kevin Gillies, Noozhawk (Santa Barbara, California), 26 Nov. 2018

“There is an element of truth to that, but Zephyr—such a canorous hippie-child name—sang a populist tune not found in any Beltway progressive songbook.” — Bill Kauffman, American Conservative, 1 Nov. 2014

Did you know?

In Confessions of an English Opium-Eater (1821), the author Thomas de Quincey describes a manservant who, after accidentally letting a loaded trunk fall down a flight of stairs, “sang out a long, loud, and canorous peal of laughter.” Canorous typically describes things, such as church choirs or birds in the spring, that are a pleasure to listen to. It derives from the Latin verb canere (“to sing”), a root it shares with a number of words that evoke what is sweet to the ear, such as chant, canticle (“a song”), cantor (“a leader of a choir”), carmen (“a song, poem, or incantation”), and even accent.

Lake桑

December 28, 2018 at 01:00PM

化学相关：开坑预告及目录

• 化学相关：从认识开始
• 化学相关：走进化学实验室
• 化学相关：我们周围的空气
• 化学相关：氧气
• 化学相关：我们需要更深入些
• 化学相关：水
• 化学相关：化学方程式
• 化学相关：碳与碳的氧化物
• 化学相关：燃料

• 定期查看此页面，看看有没有新条目。

Lake桑

每日一词：enervate（转自 韦氏词典）

Merriam-Webster’s Word of the Day for December 27, 2018 is:

enervate • \EN-er-vayt\  • verb

1 : to reduce the mental or moral vigor of

2 : to lessen the vitality or strength of

Examples:

Dehydration and prolonged exposure to the sun had enervated the shipwrecked crew, leaving them almost too weak to hail the passing vessel.

“In contrast, there was dignity in the Joad family (of John Steinbeck’s The Grapes of Wrath). When the Dust Bowl smothered Oklahoma, the Joads were not enervated, they moved west in search of work.” — George Will, The Washington Post, 7 Dec. 2016

Did you know?

Enervate is a word that some people use without really knowing what it means. They seem to believe that because enervate looks a little bit like energize and invigorate it must share their meaning—but it is actually their antonym. Enervate comes from the Latin enervatus,the past participle of the verb enervare, which literally means “to remove the sinews of,” but is also used figuratively in the sense of “to weaken.” The Latin enervare was formed from the prefix e-, meaning “out of,” and nervus, meaning “sinew or nerve.” So etymologically, at least, someone who is enervated is “out of nerve.”

Lake桑

December 27, 2018 at 01:00PM

语文相关：耄耋

màodié

解释：八九十岁。耄，形声字，音“冒”。耋，音“迭”。

使用：耄思(思绪纷乱)；耄耄(纷乱貌)；耄乱(谓年老昏乱的人)；耄夫(年老昏庸之人)；耄昏(年老昏愦)；耄聩(年老糊涂)；耄朽(老朽；衰老)；耄衰(衰老)；耋老(年老；老年人)；耋吏(老吏)；耋耄(高寿)；耋寿(指高寿的人；老人)；耋耄之年

出处：
语出《汉·曹操·对酒歌》：“人耄耋，皆得以寿终。恩泽广及草木昆虫。”

Lake桑

2018.12.26

每日一词：utmost（转自 韦氏词典）

Merriam-Webster’s Word of the Day for December 26, 2018 is:

1 : situated at the farthest or most distant point : extreme

2 : of the greatest or highest degree, quantity, number, or amount

Examples:

“The refuge, which is bordered by the Centennial Mountains and Continental Divide to the south and the Gravelly Mountains to the north, is also home to the utmost point of the Missouri and Mississippi rivers.” — Kelley Christensen, The Montana Standard, 25 Nov. 2013

“The Richmond football team is one of eight 4AA squads with a bye this week, but head coach Bryan Till is still preaching … that keeping a sense of urgency is of the utmost importance.” — Leon Hargrove Jr., The Richmond County (North Carolina) Daily Journal, 15 Nov. 2018

Did you know?

Utmost traces back to the Old English ūtmest, a superlative adjective formed from the adverb ūt, meaning “out.” Ūtmest eventually evolved into utmost, perhaps influenced by the spelling of the word most. Not surprisingly, the earlier sense of utmost carries the same meaning as outermost. The second sense of utmost, meaning “of the greatest or highest degree,” first appeared in English in the 14th century. A related word is utter, meaning “absolute” or “total,” as in the phrase “utter chaos”; it comes from Old English utera, meaning “outer,” and ultimately from ūt.

Lake桑

December 26, 2018 at 01:00PM

每日一词：benison（转自 韦氏词典）

Merriam-Webster’s Word of the Day for December 25, 2018 is:

benison • \BEN-uh-sun\  • noun

Examples:

“I offer thanks for the little things and the big things, everyday benisons and once-in-a-blue-moon moments of grace.” — Kati Schardl, The Tallahassee (Florida) Democrat, 17 Nov. 2017

“In the second half of the second act, the show shrinks and darkens as Hamilton’s life does. The last song, describing the 50-year widowhood of Eliza, gives an unexpected benison.” — Richard Brookhiser, The National Review, 6 Apr. 2015

Did you know?

Benison and its synonym benediction share more than a common meaning; the two words come from the same root, the Latin benedicere, meaning “to bless.” (Benedicere comes from the Latin bene dicere—”to speak well of”—a combination of the Latin bene, meaning “well,” and dicere, “to say.”) Of the two words, benediction is more common today, but benison has a longer history in English. Records show that benison has been used in our language since the 13th century, whereas benediction didn’t appear in print until the 15th century.

Lake桑

December 25, 2018 at 01:00PM

语文相关：亡佚

wáng

解释：散失，失传。亡、佚，都是散失、丢失的意思。

例句：这几本书久已亡佚。（这几种书很久以前就已经失传了。

出处：

• 章炳麟 《文学总略》：《汉高祖手诏》、 匡衡 王凤 镏隗 孔羣 诸家奏事，书既亡佚，复传其録。
• 田北湖 《论文章源流》：今民史亡佚，国史亦残缺不完。

Lake桑

2018.12.24

每日一词：grinch（转自 韦氏词典）

Merriam-Webster’s Word of the Day for December 24, 2018 is:

grinch • \GRINCH\  • noun

: one who spoils the pleasure of others : killjoy, spoilsport

Examples:

“Chalk it up to a weary world eager for uplifting entertainment, the surprise of a diamond-in-the-rough performer or simply the sheer delight of watching Britain’s Got Talent judge and notorious grinch Simon Cowell grow a heart right before the audience’s eyes.” — Michelle Tauber et al., People, 4 May 2009

“Not content with banning Christmas in 2016, the country’s supreme grinch, Kim Jong Un, went further by prohibiting gatherings that involve alcohol and singing, according to South Korea’s National Intelligence Service (NIS).” — John Onyanga-Omara, The Argus Leader (Sioux Falls, South Dakota), 20 Dec. 2017

Did you know?

When Theodor Geisel, better known as Dr. Seuss, wrote the children’s book How the Grinch Stole Christmas in 1957, he probably had no idea that grinch would soon enter the general lexicon of English. Like Charles Dickens’ Ebenezer Scrooge (whose name has become synonymous with miser), the Grinch changes his ways by the story’s end, but it’s the unreformed character who “hated Christmas! The whole Christmas season!” who sticks in our minds. The ill-natured Grinch, with his heart “two sizes too small,” provides us with a lively symbol of someone we love to hate, and his name has thus come to refer to any disgruntled grump who ruins the pleasure of others.

Lake桑

December 24, 2018 at 01:00PM

每日一词：assuage（转自 韦氏词典）

Merriam-Webster’s Word of the Day for December 23, 2018 is:

assuage • \uh-SWAYJ\  • verb

1 : to lessen the intensity of (something that pains or distresses) : ease

2 : to make quiet : pacify

3 : to put an end to by satisfying : appease, quench

Examples:

“Prince wrote often and eagerly about the idea of sanctuary—places where his spiritual anxieties were assuaged.” — Amanda Petrusich, The New Yorker, 25 June 2018

“The interview offers a rare glimpse of what Charles might be like as king, and is perhaps an effort to assuage critics who have worried that he would diverge from British monarchs, who are bound by tradition to reign, not rule, over their subjects.” — Palko Karasz, The New York Times, 8 Nov. 2018

Did you know?

Scholars assume that the word assuage derives from assuaviare, a Vulgar Latin term that combines the prefix ad- (“to” or “toward”) and the Latin suavis, meaning “sweet,” “pleasant,” or “agreeable.” (Suavis is also the source of the adjective suave.) To assuage is to sweeten or make agreeable or tolerable, and it is far from the only English word for relieving or softening something difficult. Others include allay, alleviate, and mitigate. Allay implies an effective calming or soothing of fears or alarms, while alleviate implies temporary or partial lessening of pain or distress. Mitigate suggests moderating or countering the force or intensity of something painful.

Lake桑

December 23, 2018 at 01:00PM

每日一词：compendious（转自 韦氏词典）

Merriam-Webster’s Word of the Day for December 22, 2018 is:

: marked by brief expression of a comprehensive matter : concise and comprehensive

Examples:

Noah Webster’s style of defining for the first American dictionary was compendious.

“For the past few years his writing has been an elegant and compendious ongoing exploration of Britain’s social history through its council estates.” — Lynsey Hanley, The Guardian, 19 Apr. 2018

Did you know?

Compendious is applied to things that are brief in statement or expression, but oftentimes the brevity is chock-full of meaning. Its synonyms run the gamut, giving us concise, terse, succinct, pithy, laconic, and summary. Concise simply suggests the removal of all that is superfluous or elaborative (“a concise description”). Terse implies pointed conciseness (“a terse reply”). Succinct implies the greatest possible compression (“a succinct letter of resignation”). Pithy adds the implication of richness of meaning or substance (“pithy one-liners”). Laconic implies brevity to the point of seeming rude or indifferent (“a laconic stranger”). Summary suggests the stating of main points with no elaboration (“a summary listing of the year’s main events”).

Lake桑

December 22, 2018 at 01:00PM

每日一词：solstice（转自 韦氏词典）

Merriam-Webster’s Word of the Day for December 21, 2018 is:

solstice • \SAHL-stiss\  • noun

1 : either of the two points on the ecliptic at which its distance from the celestial equator is greatest

2 : the time of the sun’s passing one such point on the ecliptic which occurs about June 21 to begin summer in the northern hemisphere and about December 21 to begin winter in the northern hemisphere

Examples:

People all over the world have observed celebrations linked to the summer and winter solstices since ancient times.

“The Earth wobbles on its axis once every 27,000 years…. This alters the relationship between the solstices and the distance from the Earth to the Sun.” — Steven A. Ackerman and Jonathan Martin, The Chippewa Herald, 8 Oct. 2018

Did you know?

In the Northern Hemisphere, the summer solstice usually occurs on June 20 or 21 and the winter solstice on December 21 or 22. In the Southern Hemisphere, where the seasons are reversed, the solstices are exactly the opposite. For several days around the time of the solstices, the sun’s appearance on the horizon at sunrise and sunset seems to occur at the same spot, before it starts drifting to the north or south again. Solstice gets its shine from sol, the Latin word for “sun.” The ancients added sol to -stit- (a participial stem of sistere, which means “to stand still”) and came up with solstitium. Middle English speakers shortened solstitium to solstice in the 14th century.

Lake桑

December 21, 2018 at 01:00PM

每日一词：frenetic（转自 韦氏词典）

Merriam-Webster’s Word of the Day for December 20, 2018 is:

: marked by excitement, disorder, or anxiety-driven activity :
frenzied, frantic

Examples:

“For Youse and the roughly 90 employees who work at the store, the 5-mile move capped more than a half-year of planning, followed by a frenetic two days in which everything from the one store was transferred to the other.” — Chad Umble, LancasterOnline.com, 22 Oct. 2018

“During his years as a sports broadcaster in Chicago, Adam Harris realized his volunteer work as a youth baseball coach often would provide a welcome break from the frenetic world of media.” — Karen Ann Cullotta, The Chicago Tribune, 18 Oct. 2018

Did you know?

When life gets frenetic, things can seem absolutely insane—at least that seems to be what folks in the Middle Ages thought. Frenetik, in Middle English, meant “insane.” When the word no longer denoted stark raving madness, it conjured up fanatical zealots. Today, its seriousness has been downgraded to something more akin to “hectic.” But if you trace frenetic back through Anglo-French and Latin, you’ll find that it comes from Greek phrenitis, a term describing an inflammation of the brain. Phren, the Greek word for “mind,” is a root you will recognize in schizophrenic. As for frenzied and frantic, they’re not only synonyms of frenetic but relatives as well. Frantic comes from frenetik, and frenzied traces back to phrenitis.

Lake桑

December 20, 2018 at 01:00PM

每日一词：tchotchke（转自 韦氏词典）

Merriam-Webster’s Word of the Day for December 19, 2018 is:

tchotchke • \CHAHCH-kuh\  • noun

Examples:

“How someone organizes their desk can tell you a lot about how they get work done. That’s why we’re stepping into the offices of enviably creative (and productive) people to look at what’s on their desks—pens and notebooks and gadgets, but also décor and tchotchkes.” — Deva Pardue and Maxine Builder, The New York Magazine, 10 Sept. 2018

“… a review from WireCutter … called it the best 3D pen of the lot. While we’re debating whether any home needs the flood of tchotchkes that will inevitably pour forth as a result of this gadget, the idea of drawing something into existence is pretty appealing.” — Talia Milgrom-Elcott, Forbes, 1 Nov. 2018

Did you know?

Just as trinkets can dress up your shelves or coffee table, many words for “miscellaneous objects” or “nondescript junk” decorate our language. Knickknack, doodad, gewgaw, and whatnot are some of the more common ones. While many such words are of unknown origin, we know that tchotchke comes from the Yiddish tshatshke of the same meaning, and ultimately from a now-obsolete Polish word, czaczko. Tchotchke is a pretty popular word these days, but it wasn’t commonly used in English until the 1970s.

Lake桑

December 19, 2018 at 01:00PM

每日一词：millefleur（转自 韦氏词典）

Merriam-Webster’s Word of the Day for December 18, 2018 is:

: having an allover pattern of small flowers and plants

Examples:

The museum’s collection includes several medieval tapestries with millefleur designs.

“An early 16th century millefleurs tapestry is a charmer, with children playing amidst the birds and animals and the thousand flowers of the style’s name.” — Sherry Lucas, The Clarion-Ledger (Jackson, Mississippi), 29 Sept. 2002

Did you know?

Millefleur (which can also be spelled millefleurs) came directly from French into English in the 17th century as a word for a perfume distilled from several different kinds of flowers. The literal meaning of mille fleurs in French is “a thousand flowers,” so it is easy to see how millefleur came to be applied to patterns or backgrounds of many tiny flowers or plants. A similarly colorful extension of “a thousand flowers” can be seen in the word millefiori. That term, which refers to ornamental glass characterized by multicolored flower-like designs, comes from mille fiori, the Italian phrase meaning “a thousand flowers.”

Lake桑

December 18, 2018 at 01:00PM