Experts say heat waves often become dangerous when the nighttime temperature does not drop much from the highest daytime temperature.

VOA: special.2010.07.27

But in terms of SI units, which become much more useful if you're actually trying to use intensity in a problem and cancel out your units, we're just talking about joules per second is what intensity is.

但是用国际单位制，这个变得越来越有用了,如果你实际上在使用强度,来解决问题和约化单位，我们仅仅讨论每秒钟的焦耳,这就是强度。

麻省理工公开课 - 化学原理课程节选

Here up north, one of the hotspots that has become very much of a hotspot over the last 10 years or so.

这儿向北走，有一个景区最近十年变得非常热门。

卡姆登最棒 - SpeakingMax英语口语达人

She said "My old job had become Mickey Mouse, Now I have much more creative one."

VOA: special.2009.03.29

What it is about Baidu and the Chinese search market that's allowed Baidu to become much more successful than Google and Yahoo! in China?

是什么让百度在中国,比谷歌以及雅虎做得更成功？

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

And that parents who share ideas with their children and talk with them and who've met most of their child's friends are much less likely to have children who become bullies."

VOA: special.2010.05.06

Remember, that's going to become important when we talk about bonding, we don't need to worry about it too much right now.

记住，这在我们讨论到,成键的时候很重要，现在你们还不用太多的考虑它。

麻省理工公开课 - 化学原理课程节选

"You know,forecasting's become a very hazardous business so I don't want to commit myself too much.

VOA: standard.2009.12.20

You didn't realize how much part of your life it was going to become.

你没想到你生命中有多少东西,将会发生改变。

普林斯顿公开课 - 人性课程节选

But souvenirs have become a major business as well, and at the 2010 Winter Games, souvenirs require almost as much strategy and patience as winning a medal.

VOA: standard.2010.02.17

Or if I decided to become an artist or a scholar or a beach bum or a farmer, how much better off or worse off would I have been?

如果我决定成为一名艺术家或学者,一个流浪汉或一个农夫，我会更幸福还是更不幸？

耶鲁公开课 - 死亡课程节选