In order to explain it-- I had to write down the binomial distribution to explain it properly.

要解释这一点,我要先在黑板上写一个二项分布,以便于解释清楚这个问题

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That you could explain human psychology without mental notions like desires and goals.

二，并不需要诸如欲望目标等概念,来解释人类的心理学现象。

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Two--let me say something about this.

二,我想解释一下这一点

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