Occasionally, you'll find you need to cancel out units, because, of course, you're always doing unit analysis as you solve your problems, and sometimes you'll need to convert joules to kilogram meters square per second squared.

偶然地，你会发现需要消除单位，因为在解题时,经常要做单位分析，所以有时候需要把,焦耳换做,一千克乘以米的平方除以秒的平方。

麻省理工公开课 - 化学原理课程节选

Right? The state of nature is not seen by him as an actual historical condition in some ways, although he occasionally will refer to what we might think of as anthropological evidence to support his views on the state of nature.

他并不是把自然状态理解为,某种方式的实际的历史性的状态，即使他偶然性地,用人类学的证据,去支持他自然状态的观点。

耶鲁公开课 - 政治哲学导论课程节选