英语语法分析

Traditionally the relatedness of species has been ascertained by a close comparison of their anatomy.

传统上，物种的亲缘关系是通过对它们的解剖结构的密切比较来确定的。

There can be no doubt about the relatedness of thimble to thumb.

顶针毫无疑问是与拇指Thumb一词有关。

And in fact, you get his calculations by looking at genetic relatedness.

事实上，你可以从遗传相似度，得到他的推算。