努力英文怎么写的

努力的英文单词：effort，复数efforts。例句：

The government's attempt to kick-start the economy has failed.政府刺激经济的努力失败了。

I only succeeded through hard work.

我就是因为努力工作才成功的。

Hard work never did anyone any harm.

努力工作对任何人都绝无害处。