我们划船逆流而上。

We were rowing against the current.

《牛津词典》

我们需要集中在核心业务上。

We need to concentrate on our core business.

《牛津词典》

我们住在一处庄园上。

We lived on an estate.

《牛津词典》

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

So, in order to fill our octet, what we do is put two on the nitrogen and two on the carbon.

因此，为了填满我们的“八隅体“,我们需要将两个放到氮上，将另外两个放到碳上。

麻省理工公开课 - 化学原理课程节选

When we did the spring, we had this theory of Hooke's Law that told us something, and we built a simulation, or built some tools around that theory.

当我们写弹簧程序的时候,我们有胡克定律来告诉我们原理，然后我们建立了一个仿真模型，或者说是在这个理论基础上建立了一些工具。

麻省理工公开课 - 计算机科学及编程导论课程节选