So, you already have a hint that methyl groups are never in the middle, they always have to be on the outside.

那么，你已经得到了一个提示,那就是甲基永远都不可能在中间，它们总是在外侧。

麻省理工公开课 - 化学原理课程节选

Maybe a typical farm, you might imagine, is maybe ten acres; that is a very small farm.

一个典型的农场,你可以想象得到的,也许就十亩地,已经相当小了

耶鲁公开课 - 古希腊历史简介课程节选

But they've, you're saying, but they've all been paid for their services.

但是你也说了，他们已经得到了自己的劳动报酬。

耶鲁公开课 - 公正课程节选

if you do that under the situation where you've put your plasmid into these micro-organisms then you're going to have little colonies that grow many copies of the bacterial cells.

如果你在质粒已经进入了微生物,的情况下培养它们,你就会得到许多小菌落,里面长有很多增殖出来的细菌

耶鲁公开课 - 生物医学工程探索课程节选