So, you've got polonium or thorium sitting inside this leaded box with one opening.

把钋或者钍放在,开一个小口的含铅的盒子里面。

麻省理工公开课 - 固态化学导论课程节选

It was an eye-opener, but these days, the children are younger.

这是让我开眼界的事情，但是现在，孩子们更小了。

现在的孩子好可怕 - SpeakingMax英语口语达人

We remove a pebble, system expands.

移开一粒小石子，系统膨胀一点。

麻省理工公开课 - 热力学与动力学课程节选

There's some space up in heaven where all the unborn babies are that will live in the future and, unfortunately, they're not able to have a town meeting; but, let's suppose they could.

想象一下在天堂的某处,所有尚未出生但即将诞生的小婴儿们在那儿，可惜的是，他们开不了人民大会吧;,不过，我们假设这能成真。

耶鲁公开课 - 金融市场课程节选

So the DNA is going to get spread out on this gel according to size, with the small ones going farther and the large ones not going as far.

因此DNA会根据大小,在凝胶上分散开,小的片段会快一些,大的片段不那么快

耶鲁公开课 - 生物医学工程探索课程节选