Both of these scenarios imply that specialization to each niche occurred only once.

这两套不同的理论都意味着，适应不同的栖息地生活环境的这一过程只发生了一次。

youdao

Both of these scenarios imply that specialization to each niche occurred only once.

这两套不同的理论都意味着，适应不同的栖息地生活环境的这一过程只发生了一次。

youdao