表达 “take a well-earned break” 的意思是 “在长时间的辛苦劳累后好好地休息、放松一下”。合成形容词 “well-earned” 在这里着重表达 “应该的、理所应当的”。

例句
After studying hard for my exams, I took a well-earned break.
在为了考试刻苦学习之后，我好好地休息了一下。

Once we've launched this product we can all take a well-earned break.
一旦我们推出了这个产品，我们就可以好好休息一下。

You’ve been working too hard! You deserve to take a well-earned break.
你工作太辛苦了！你应该好好休息一下。