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

So you have this firmament, ; Which is beaten back to hold back primeval waters that are pressing in; you have land which is holding down the waters here.

现在有了苍穹，它被锤平来阻挡汹涌而至的水流;,也有阻挡下面水流的土地。

耶鲁公开课 - 旧约导论课程节选

And shielding is a little bit of a misnomer because it's not actually that's the electron's blocking the charge from another electron, it's more like you're canceling out a positive attractive force with a negative repulsive force.

屏蔽有一点点用词不当,因为它事实上不是,电子阻挡了来自另一个电子的电荷,它更像你在用一个负排斥力，抵消一个正吸引力,但是屏蔽是考虑这个问题,的很好的方式。

麻省理工公开课 - 化学原理课程节选

What would stop an opposing army from flanking you?

如何阻挡敌方军队的侧翼攻击

耶鲁公开课 - 古希腊历史简介课程节选

It is not to bind them from voluntary actions but to direct and keep them in such motion as not to hurt themselves by their own impetuous desires, rashness or indiscretion as hedges are set not to stop travelers but to keep them on their way."

不是约束他们去做本该做的事,而是约束他们不做不该做的事,以免因自己的欲望，轻率，鲁莽而危机自身，这就像是篱笆的功能一样,不是要阻挡行路而是为小路指引方向“

耶鲁公开课 - 政治哲学导论课程节选

Those doctors would still not be able to improve school performance of the kids with learning disabilities and they would still not be able to prevent cognitive impairment and loss of memory in older adults because at this point we don't really understand enough about learning To know which neurons and synapses within a circuit would need to be tinkered with.

他恐怕还是改变不了有学习障碍的孩子们的表现,阻挡不了老年人的认知功能损害和记忆力的衰退,因为我们对这一学科的确知之甚少,不知道知道回路中的到底是哪些神经元和神经突触需要修复。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

And the bottom part is the land, which is pressing down waters below.

而底下的部分就是土地，是阻挡从地下涌出的水。

耶鲁公开课 - 旧约导论课程节选