伏拉汤姆：好吧，迈克尔，和我们在一起，别离开，因为我们想跟你谈谈另一个恐怖的东西，阿尔法常数可能不那么“恒定不变”，好吗？

FLATOW: All right, Michael, stay with us because we want to talk to you about another spooky thing, this alpha constant that may not be so constant, okay?

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这篇报告描述了某一个人为假定的自然界的基本物理常数，似乎并不是一直保持恒定不变。

The report describes how one of the supposed fundamental constants of Nature appears not to be constant after all.

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但是灭绝的速度同一个恒定的常数有着相当大的距离。

But the rate of extinction is far from constant.

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