If dark matter particles exist, scientists say, they should be able to observe a small amount of light given off when they hit the nucleus of a xenon atom.
VOA: special.2009.07.21
So this last version of the red light introduces interesting complications which I don't think should confuse us.
所以,关于红灯的这最后一个例子,让我们思考了平时不会思考的问题。
We'll turn eventually to the question, how should we live in light of the fact that death is the end?
我们将最终将要探讨,在知道死亡就是终结的情况下我们该如何生存?
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