In Russia the small Asiatic cockroach has everywhere driven before it its great congener.

俄罗斯，小亚洲蟑螂到处都驱赶的大同类。

We have seen that a species under new conditions of life may change its habits, or it may have diversified habits, with some very unlike those of its nearest congeners.

我们经看到， 一个物种新的生活条件下能会改变的习性， 或能具有多样化的习性， 其中一些习性与其最接近的同类非常不同。