蝙蝠有一个问题：该如何在黑暗中找到他们的道路。

Bats have a problem: how to find their way around the dark.

youdao

蝙蝠有一个问题：该如何在黑暗中找到他们的道路。

Bats have a problem: how to find their way around the dark.

youdao