但是这些圆柱体在分子水平上是紧密结合的。

But these cylinders cling together at a molecular level.

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而对此唯一的解释就是，在分子水平上，我们有着共同的祖先。

And there is only one explanation for that at the molecular level, which is common ancestor.

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药物遗传学是在分子水平上研究这些差异的科学。

Pharmacogenomics is the science of studying these variations at the molecular level.

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