So we haven't gotten to molecules yet, we're just talking about single atoms or single ions, but what's nice is just talking about this very straightforward principle of atomic radius.

我们还没有开始讲分子，我们仍然只是在讨论单个原子或离子，但它的好处在于可以讨论,这个关于原子半径的非常简单直接的原理。

麻省理工公开课 - 化学原理课程节选

You know, I moved to Los Angeles in my late 20s and early 30s. I was single. I hadn't met her yet and so,

我是在我快30岁的时候去的洛杉矶。那时候我单身。还没遇见我妻子。

旧金山和洛杉矶的差异 - SpeakingMax英语口语达人