白天，我们会用不同的东西：铅笔、水彩颜料、油画颜料。

During the day, we'll use different things: pencils, watercolors, oil paints.

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厨师这里还有一只鳟鱼头——后面我们会用的上。

The cook also had one trout head—comes in handy too.

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我们会用酸污染空气，用污水污染河流，用石油污染海洋。

We can pollute the air with acids, the rivers with sewage, the seas with oil.

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So we'll take h 2 and we'll run -- or actually we'll have h 2 filled in an evacuated glass tube.

我们马上就会在氢原子上试一试,我们用氢气-我们把玻璃管充满氢气。

麻省理工公开课 - 化学原理课程节选

We had no idea what was going on with the system, with how people were using it. We were making guesses.

我们不知道这个系统会怎么样，也不知道人们用得怎么样，我们只是在猜测。

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选

And the idea is that when you do these Lewis dot structures, we're representing electrons with dots, which we'll see in a minute, and each dot is going to represent a valence electron.

而当你遇到这些路易斯点结构时，我们会将电子用点来表示，我们马上就会看到，每个点都代表了一个价电子。

麻省理工公开课 - 化学原理课程节选