在那之前，人类作为一个整体永远不会有外来的同类者。

Beforethen, humanity as a whole will never have had an external counterpart.

youdao

不幸的是，这样的想法，即同类者互知，可能很流行，但实际上是错误的。

Unfortunately, this thought, popular as it may be, that it takes one to know one, just seems false.

youdao

youdao

Unfortunately, this thought, popular as it may be, that it takes one to know one, just seems false.

不幸的是,这样的想法,即同类者互知,可能很流行,但实际上是错误的

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