如果一种性状或疾病在同卵双胞胎中的同时发生的概率高于异卵双胞胎，那么这种性状或疾病是“可遗传的”。

A trait or disease is called heritable if monozygotic twins are more similar to each other than dizygotic twins.

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That says that if you have independent probabilities, then the probability of two events is equal to the product of their probabilities.

意思是,几个相互独立的事件,其中两个事件同时发生的概率,等于他们分别发生的概率的乘积

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This will generalize to probability of A and B and C equals the probability of A times the probability of B times the probability of C and so on.

简单的说,A和B和C同时发生的概率,等于A发生的概率乘以B发生的概率,乘以C发生的概率,以此类推

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