We should keep in mind, as I have before insisted, that the inherited effects of the increased use of parts, and perhaps of their disuse, will be strengthened by natural selection.

正如我之前坚持的那样， 我们应该牢记， 自然选择会加强零件使用的增加以及它们的废弃所产生的遗传效应。

The evidence that accidental mutilations can be inherited is at present not decisive; but the remarkable cases observed by Brown-Sequard in guinea-pigs, of the inherited effects of operations, should make us cautious in denying this tendency.

意外残废可以遗传的证据目前不是决定性的；但是 Brown-Sequard 在豚鼠身上观察到的关于手术遗传效应的显着案例， 应该使我们在否认这种趋势时保持谨慎。