"Sanctions have had a real effect on the performance of our industries, mining manufacturing, we can't get spare parts, we can't get credit lines and we are blocked in regard to aid from the World Bank and IMF."

VOA: standard.2009.09.12

And the reason that they're the least sheilded is because they can get closest to the nucleus, so we can think of them as not getting blocked by a bunch of other electron, because there's some probability that they can actually work their way all the way in to the nucleus.

它们最不容易被屏蔽的原因,是因为他们可以更加接近原子，所以我们可以认为它们,最不容易被其它原子阻挡住，因为它们有一定的概率,离原子核非常近。

麻省理工公开课 - 化学原理课程节选

And then after we get passed the warehouse a very long blocked, long warehouse I see a locomotive and I say hey look there's a train.

走过仓库以后,走过这个长长的，遮挡视线的仓库,我看到火车头,我说，嘿，有辆火车。

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