这也明显地表示出，我们对于每一特殊变异的原因是茫然无知的。

It serves to acknowledge plainly our ignorance of the cause of each particular variation.

youdao

这也明显地表示出，我们对于每一特殊变异的原因是茫然无知的。

It serves to acknowledge plainly our ignorance of the cause of each particular variation.

youdao