他们可以在未知的海域航行数天，并对该地区进行评估。他们知道如果没有发现任何东西的话，他们可以掉头，并借着信风迅速返回。

They could sail out for days into the unknown and assess the area, secure in the knowledge that if they didn't find anything, they could turn about and catch a swift ride back on the trade winds.

youdao

尼基：是的，他们在寻找生命，但是他们还4没有发现任何东西。

Nicky: : Yes, they're looking for life but they (4) (not find) anything yet.

youdao

尼基：是的，他们在寻找生命，但是他们还4没有发现任何东西。

Nicky: : Yes, they're looking for life but they (4) (not find) anything yet.

youdao