If he had gone further, he would not have known what criticism he might have run into.

如果他走得更远，他将不知道自己将卷入怎样的批判中。

If the scientists had included African populations in their work, they might have known.

如果科学家已经把非洲基因囊括进了其研究中，那么他们可能已经意识到了这个问题。

I like this balance in my life, and I sometimes wish it is something my mother might have known.

我喜欢生活中的这种平衡，我希望我的母亲能够懂得这些。

The hand which fastened that pin might have struck him to the heart, and he could never have known who had slain him.

钉上纸条的那只手，满可以用刀刺进他的心房，而且，他永远也不会知道究竟是谁杀害了他。

Finally, another theory has come to light recently, and it claims that allergens are actually more dangerous than we might have known.

最后，最近出现的另一个理论，认为过敏原实际上比我们可能知道的更危险。