The workers believe it was bin Laden, but cannot be sure.

这些劳工认为那就是本·拉丹，但无法确定。

youdao

Unfortunately I favor melanin but cannot be sure from the photos.

然而，我不能从这些图片中确信是黑色素。

youdao

It maybe that some have them already, but we cannot be sure.

也许有些人已经拿到了，但我们不能肯定。

youdao

It may be that some have them already, but we cannot be sure.

也许有些人已经拿到了，但我们不能确定。

youdao

But they cannot be sure.

不过，他们还不能确定。

youdao

But they cannot be sure.

不过，他们还不能确定。

youdao