(by which time its use had become too widespread to resist), preferring instead descent with modification.

达尔文也没有使用“进化”这个词（那时这个词已经用得很广泛，有极大的诱惑力），而是代之以“后代渐变”。

Turning to geographical distribution, the difficulties encountered on the theory of descent with modification are serious enough.

谈到地理分布， 遗传变异理论遇到的困难已经够严重了。

Therefore I cannot doubt that the theory of descent with modification embraces all the members of the same great class or kingdom.

因此，我毫不怀疑， 变异后裔理论涵盖了同一个大阶级或大王国的所有成员。

That many and serious objections may be advanced against the theory of descent with modification through variation and natural selection, I do not deny.

对于通过变异和自然选择进行修改的血统理论， 可能会提出许多严重的反对意见， 我并不否认。

Thus it is, as I believe, that two or more genera are produced by descent with modification, from two or more species of the same genus.

因此，正如我所相信的那样， 两个或多个属是从同一属的两个或多个物种通过变异后代产生的。

On the view of descent with modification, the origin of rudimentary organs is comparatively simple; and we can understand to a large extent the laws governing their imperfect development.

从变异遗传的观点看， 残迹器官的起源比较简单；我们可以在很大程度上理解支配它们不完全发展的规律。