他们的问题是现今全球范围内最大也是最终的挑战。

They're the biggest challenge of the day globally and the whole end game.

youdao

最大的挑战面对许多人是在哪里可以找到他们。

The biggest challenge many people face is where to find them.

youdao

但他们的最大的挑战是对抗自然。

Their biggest battle is against nature.

youdao

但他们的最大的挑战是对抗自然。

Their biggest battle is against nature.

youdao