"There are a lot of doctors who are willing to volunteer once, but not many doctors who are willing to repeat their experience."

VOA: special.2010.07.26

I met a lot of people there and I never once got the idea that anyone there was evil or grasping.

在那我见了很多人,但是我没有察觉到,任何恶毒或者贪婪的气息。

耶鲁公开课 - 金融市场课程节选

And once you know how it sounds, making those sounds for yourself would be a lot easier to do.

一旦你知道该怎么发音，你就能更加容易地把它说出来。

想征服英语的话 - SpeakingMax英语口语达人

"Once you get noticed by a company, it gets a lot easier, but it's so hard to get noticed because there's so many people looking for so few jobs."

VOA: special.2010.06.11

> Once we changes phases, realize that a whole lot more was happening on the next screen.

>一旦我们有所改变，下一秒就会发生许多,翻天覆地的变化。

哈佛公开课 - 计算机科学课程节选

So once again, he is raising the stakes." Congressional Democrats also have a lot riding on passage of a health care bill.

VOA: standard.2010.03.16

They might matter a lot because humans have, in general, a confirmation bias such that once you believe something other information is then encoded along the likes to support what you believe.

可能是因为人…,所有人都有确认偏向,也就是说，一旦你相信了某件事,其他信息都会被你解读成,支持你所相信的信息。

耶鲁公开课 - 心理学导论课程节选

"There are a lot of doctors who are willing to volunteer once.

VOA: standard.2010.06.29

What you'll actually find in terms of asking your TAs about the Lewis structure rules is that sometimes they won't be as good at them as you are, and the reason is once you've drawn enough of these structures, you start to get a lot of chemical intuition about it just looks wrong to you if it's wrong.

其实如果大家去问助教,路易斯结构的规则是什么的话,你会发现他们有时候可能并不比你们记得更清楚，因为一旦你画过足够多的路易斯结构，你就会开始获得很多化学直觉,如果它是错的，那么对你来说它看起来就是错的。

麻省理工公开课 - 化学原理课程节选

"And because small retailers don't have economies of scale to be able to order a lot of merchandise at once, they are not able to negotiate the best prices or offer the best deals to their shoppers."

VOA: standard.2009.12.20