很多实验证据证实了打哈欠的另一个不同的功能，它能让我们做好准备，改变活动状态。

The empirical evidence, such as it is, suggests an altogether different function for yawning—namely, that yawning prepares us for a change in activity level.

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所以，让我们做好准备。

So, let's be prepared.

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让我们做好准备。

Let's get ready.

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Sometimes it's remarkable for all of us if we try to be very prepared-mind-oriented, very proactive around where the most interesting opportunities.

有的时侯,如果我们能时刻做好准备，积极地去寻找那些很有吸引力的机会,那将会是一件很了不起的事。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

Your first responsibility in that role is to make sure the president is well prepared as possible to do his job.

我们的首要任务,是确保总统,做好充分准备,来开展他的工作。

普林斯顿公开课 - 国际座谈会课程节选

Last lecture, you might have thought this was a SHASS class, it's not like a philosophy class, and it was important to set the stage for what we're going to talk about, but we talked about very high level things.

上一节课，你们可能认为,这课没什么意思，这可能不太像一门哲学课，为我们所要讨论的去做好准备,是很重要的，我们上节课讲的是一些比较高层次的的东西。

麻省理工公开课 - 计算机科学及编程导论课程节选