Unwrapping a stick of gum can even turn out to be a substitute ritual for lighting up a cigarette as a conditioned response to stress.

点燃香烟是你在压力下的条件反射，打开一块口香糖甚至就可以替代你的习惯性动作了。

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A nuclear Africa might make some Western environmentalists (not to mention nonproliferation advocates) uncomfortable, but lighting up a dark continent is going to take more than good intentions.

一个核非洲也许会让一些西方的环保主义者(更不用说防扩散的拥护者)不舒服，但是点燃一个黑暗的大洲将不仅仅是善意。

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Also using a split lighting set up helps by keeping one side of the face in shadow.

布光也要配合，以便让脸的一侧消失在阴影中。

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