Mitchell beat Lewis by three-hundredths of a second.

米切尔以0.03秒的优势打败了刘易斯。

《柯林斯英汉双解大词典》

He was over a second faster than his previous best time.

他比自己以前的最好成绩快了一秒多。

《柯林斯英汉双解大词典》

Can't you hold still for a second?

你一秒钟不动都不行？

《柯林斯英汉双解大词典》

So, if something cycles through five wavelengths in a single second, we would just say that the frequency of that wave is five per second.

如果一个东西在一秒,内经历了五个波长，我们就说这个波的,频率是每秒5次。

麻省理工公开课 - 化学原理课程节选

So, we know this point at one second is 20 meters, so let's just ask one other question and we'll stop.

我们知道该物体上升一秒后到达二十米处,关于这个模型的最后一个问题

耶鲁公开课 - 基础物理课程节选

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