徒劳的英文：
futile

参考例句：

Not availing; ineffectual or useless.
徒劳的;无效的，无用的

ungrateful adj.
忘恩负义的；使人不愉快的；徒劳的；讨厌的

It is vain to attempt to root out heresy by force.
试图用暴力消除异端邪说是徒劳的。

It would be idle to try to make him change his mind.
想使他改变主意是徒劳的。

All their efforts seemed helpless.
他们的一切努力似乎是徒劳的。

It's no use trying to get round paying the income tax!
试图避免交个人所得税是徒劳的!

The most futile of the expeditions was the Children's Crusade, which took place in 1212.
最徒劳的远征是1212 年的儿童十字军。

It was useless to try to stabilize the dying reactionary situation.
试图稳定垂死的反动局面是徒劳的。

He tried to varnish over the facts, but it was useless.
他想粉饰事实，但那是徒劳的。

It was useless to try to "stabilize the dying reactionary situation."
试图稳定垂死的反动局面是徒劳的。

futile是什么意思：
adj. 无效的，无用的；琐碎的，不重要的；没有出息的

He lived a futile life.
他一生过得庸庸碌碌。

But it seems so futile afterwards.
可是到后来就变得很琐碎。

It‘s just a futile thing.
这只是无关紧要的事。

Something that is vain, futile, or worthless.
无价值的东西空虚、无用或无价值的东西

To talk or act in a feeble or futile way.
说废话；做无聊的事以无用的或徒劳的方式说话或做事