救援任务从一开始就毫无希望。

The rescue mission was ___hopeless from the start.

他们搜寻幸存者，但这是徒劳的。

They searched for survivors but it was ___hopeless.

尝试赢得对抗那个象棋电脑是毫无希望的。

Trying to win against that chess computer is ___hopeless.