## 分类不明：哪里来的那么多符号？

Phosphorus

Phenolphthalein

“et”，拉丁文的“和”，现在已简作“&”。这个“et”还演变成了加号，与塔塔里亚使用意大利语的“plu”的“μ”一样，都是草写成了加号，也就是“+”。

“-”号也一样，拉丁语的“minus”的m写草了写成了横杠，与我不谋而合。

“÷”一开始也是减号，直到有人用“:”表示比、除，用“—”（除线）表示除，才有了拉哈正式规定。

“～”，莱布尼兹用它表示相似，下面加等号表示全等。

Lake桑

2019.1.6

Merriam-Webster’s Word of the Day for January 6, 2019 is:

1 : example, pattern; especially : an outstandingly clear or typical example or archetype

2 : an example of a conjugation or declension showing a word in all its inflectional forms

3 : a philosophical and theoretical framework of a scientific school or discipline within which theories, laws, and generalizations and the experiments performed in support of them are formulated; broadly : a philosophical or theoretical framework of any kind

Examples:

“I was just obsessed as a kid with David and Goliath. It’s probably the ultimate conflict paradigm in literature. But I was always on the side of Goliath. I loved Goliath. I didn’t like David at all and I wished Goliath could win.” — Lee Child, quoted in The Spectator, 1 Dec. 2018

“Phoebe has a talent for taking a musical or poetic paradigm and tilting it, inverting the norm in a way that expands and challenges the boundaries of the standard. Her songs marry convention with experimentation, both with a musical arrangement and production, and in the actual poetry of the songs.” — Julien Baker, quoted in New York Magazine, 26 Oct. 2018

Did you know?

Paradigm traces to a Greek verb meaning “to show,” and has been used in English to mean “example” or “pattern” since the 15th century. Some debate exists, however, about what kind of example qualifies as a paradigm. Some people say it’s a typical example, while others insist it must be an outstanding or perfect example. The scientific community has added to the confusion by using it to mean “a theoretical framework,” a sense popularized by American scientist Thomas S. Kuhn in the second edition of his influential book The Structure of Scientific Revolutions, published in 1970. In that work, Kuhn admitted that he had used paradigm in 22 different ways. Some usage commentators now advise avoiding the term entirely on the grounds that it is overused.

Lake桑

January 06, 2019 at 01:00PM