n And these are known as anions. It has the n, which might conjure up negative, or anion and minus both have five letters.

这些就是负离子，有，能让我们想起，负，这个字，或者负离子和负号都是5个字母。

麻省理工公开课 - 固态化学导论课程节选

N and this is known as the Born exponent.

在6到12之间，，N，lies，between，6，and，12，这就是著名的波尔指数。

麻省理工公开课 - 固态化学导论课程节选