Nicholas Lardy, an economist and senior fellow at the Washington-based Peterson Institute, says China's unwillingness to adopt derivative loans and other high-risk financial products helped to shield it from the impact of the world economic downturn.

VOA: standard.2009.11.10

A kind of consequence of this is if we're thinking about a multi-electron atom, which we'll get to in a minute where electrons can shield each other from the pull of the nucleus, we're going to say that the electrons in the s orbitals are actually the least shielded.

这样的一个后果就是,如果我们考虑一个多电子原子，我们等会就会讨论到它,电子会互相,屏蔽原子核的吸引，我们说ｓ轨道电子,更不容易被屏蔽。

麻省理工公开课 - 化学原理课程节选