在第三和第四阶段（通常称为“深度睡眠”），这时唤醒一个人是很难的。

During stages three and four (often called "deep sleep") , it is very hard to wake up a person.

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六场比赛后，第三和第四联赛的职业球队进入，然后，两场比赛后，来自英超联赛的最大俱乐部进入。

After six matches, the professional teams from the third and fourth league enter and then, two games later, the biggest clubs from the Premier League.

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然后有了第二个受害者，接着是第三和第四个。

Then there is a second victim, a third and a fourth.

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And the bigger lesson from that is that entropy, unlike energy u or enthalpy H, we could define an absolutely number for it.

热力学第三定律的一个更重要的推论是,与内能和自由焓不同，我们可以给上定义一个绝对的数值。

麻省理工公开课 - 热力学与动力学课程节选

Third thing we want you to do, is to understand the fundamental both capabilities and limitations of computations, and the costs associated with them.

我们希望你们做的第三件事儿，就是了解,计算的基本能力，和局限以及他们的代价。

麻省理工公开课 - 计算机科学及编程导论课程节选

So, over the last few lectures we've worked and struggled so formulate the second and third laws of thermodynamics in addition to the first.

在前几次课中,我们通过努力明确的,给出了热力学,第一，第二和第三定律。

麻省理工公开课 - 热力学与动力学课程节选