Hans wielded a bedcover, but it was a vain effort.

汉斯挥舞着床罩，但这于事无补。

The old man smiled and said, Well, do you really think your trip was a vain effort? Think about it carefully.

好吧，你真的认为你的旅行什么收获都没有吗？

Her hands were clasped in her lap in a vain effort to keep them steady.

她的双手紧握在膝盖上， 徒劳地试图让它们保持稳定。

For three hours, the dirigible circled the landing field at Lakehurst New Jersey, dumping more water ballasts than ever before in vain efforts to level off.

这艘飞船在新泽西州莱克赫斯特的机场上空盘旋了三个小时，倾下了比以往任何时候都多的压舱水，但却无法平衡船体。

You will remember, Lestrade, the sensation when the pearl vanished and the vain efforts of the London police to recover it.

雷斯垂德，你会记得珍珠消失时的轰动，以及伦敦警方徒劳地追回珍珠的努力。

From the look of unutterable woe upon his face, it appeared to be his doom to spend eternity in a vain effort to make his accounts balance.

从他脸上无法形容的悲伤表情来看，他似乎注定要花费永恒的时间来使他的账目平衡。

May was enchanted at the idea of going to the country, and childishly amused at the vain efforts of the eight bridesmaids to discover where their mysterious retreat was situated.

梅对去乡下的想法很着迷，对八位伴娘徒劳地寻找她们神秘的隐居地的努力感到孩子气地好笑。