And their meaning is as easy to understand as "falling off a log."

VOA: special.2009.06.07

It's easy to get lost in this sea of quantities, none of which have obvious meaning.

这里没有一样是，有明显的物理意义的。

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So, he's using intuitive-- he says difficult or easy-- so he says it's difficult, meaning the probability is very low, or easy, meaning that probability is high.

所以他直接进行了描述,他用的是困难和简单两词,他说的困难,意思就是概率很小,他说的简单,意思就是概率很大

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