翻译成英语：我的努力没有白费。谢谢！

Their efforts were not in vain.
他们的努力没白费。

His efforts had no smallest chance of success.
他的努力毫无成功的希望。

My effort is not in vain
My efforts are not in vain
都可以

嗯,用in vain是很好的用法.不过我觉得effort用复数好一些.

My efforts are not in vain.

my efforts finally paid off

my effort is not wasted.!!!

我的才对.

My eggerts are not wasted.