But hard work should be a reward in itself because not all hard work of lasting value is compensated handsomely.

可是努力工作本身也是对自己的一个奖励，因为不是所有努力工作都能得到可观的回报。

youdao

But the truth is that not everyone can get what they want, even they work hard so much, but if working hard does not bring success, why should they still need to work hard.

但是事实上，并不是每个人都可以得到他们想要的，即使他们很努力的工作，但是如果付出没有带来成功，为什么人们还要努力工作呢。

youdao

To achieve success, everyone needs to work hard, but they should learn to get rest reasonably.

为了取得成功，每个人都需要努力工作，但是他们也要学会合理休息。

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"There are so many people who work so hard everyday but they can't realize the benefits of that hard work to the extent that they should."

VOA: standard.2009.11.03

Why should U.S. citizens get a benefit not from education or hard work but from something they had nothing to do with -- where they were born?

CNN: U.S. workers can't hide from competition

There are clearly hard issues of science and engineering at work here, but there seems little question that BP should be doing everything it can to fix the problem.

FORBES: How BP Should Respond To The Spill