You take fuel, rather you take something that's warm, and you put it in contact with the atmosphere, it cools down.

改变约束,继续加热,气体膨胀。

麻省理工公开课 - 热力学与动力学课程节选

What makes it so safe that it can be put in one of the most sensitive places in your body, in contact with your eye?

是什么使得它足够安全,以至于能放到眼睛,这个人体最敏感的器官之一上

耶鲁公开课 - 生物医学工程探索课程节选

It expands. You change your constraints on your system, you heat it up some more, then you take the heat source away, and you put it back in contact with the atmosphere. And you cool it a little bit, change the constraints, cool it a little bit more, and heat, and you've got a closed cycle engine.

让它与大气接触冷却,改变约束，使它继续冷却，然后又再次加热,这就是循环热机，我们以前也研究过，更复杂的机器。

麻省理工公开课 - 热力学与动力学课程节选

Then we're going to take these plasmid vectors and we're going to somehow put them in contact with cells in such a way that the cells ingest the DNA and they use it.

然后要使这些质粒载体,以一种特别的方式与细胞接触,让细胞吞入质粒载体并使之表达

耶鲁公开课 - 生物医学工程探索课程节选

Now if I put them in contact with one another, the plasmid that's been opened and fragments of the DNA - special fragments that I've produced with the same restriction enzyme, they'll have the same sticky ends, they will naturally hybridize with one another.

如果我让它们互相接触,已经切开的质粒和DNA片段--,这DNA片段是我已用同种限制性内切酶,处理过的特别片段,这两者会有相同的粘性末端,它们会自然地相互杂交

耶鲁公开课 - 生物医学工程探索课程节选