我们遇到了一些来自加拿大的好朋友，和他们一起度过了美好的两天。其中一个叫克莱夫的朋友，明年将去你的大学读书。

We met some nice people from Canada and spent two great days with them. One of them, Clive, is going to your university next year.

youdao

他们真正在意的是离开美丽的荒野和他们的好朋友，来回到他们城市里的正常生活。

What they do mind is leaving the beauty of the wilderness and the good friends they've made to return to their normal lives in the city.

youdao

我交了很多好朋友，和他们相处得也很好。

I have made many good friends and I'm getting on well with them.

youdao

So, I said I'd tell you a little bit more about where this Bohr radius came from, and it came from a model of the atom that pre-dated quantum mechanics, and Neils Bohr is who came up with the idea of the Bohr radius, and here is hanging out with Einstein, he had pretty good company that he kept.

我要告诉你们,波尔半径是从哪里来的,它起源于前量子力学时代的，原子模型,尼尔斯，玻尔提出了，波尔半径的概念,这是他和爱因斯坦在一起，他们是好朋友，当我们讨论这个原子模型时你们要记住的是，在1911年。

麻省理工公开课 - 化学原理课程节选