He has become convinced that what he has done will pay off one day.
他坚信他所做的努力总有一天会得到回报的。
You must pay off your old loan before you can obtain a new one.
你必须还清旧账，然后才能再借款。
In work, however, jumping from one thing to the next doesn't necessarily pay off.
但是就工作而言，从一种工作跳到另外一种工作并不一定合算。
A smile will beat a lifetime, a drop of tears will pay off one.
一个笑就击败了一辈子，一滴泪就还清了一个人。
Work harder and practise more, and your hard work will pay off one day.
努力学习，勤加练习，你的努力会得到回报。
Just remember tough past is pleasure. Your hard work will, one day, pay off. This, I have no doubt. about.
艰难的过去是站起来幸福的基石，真正努力付出了，终有一天你会得到应有的的回报，对此，我坚信不疑。
Humans, however, show a third sort of altruism-one that has no obvious pay-off.
但是人类却表现出了第三种利他主义—一种不会有什么赢利的利他主义。
A smile is the beat generation, a drop of tears will pay off one.
一个笑就击败了一辈子，一滴泪就还清了一个人。
A smile is the beat generation, a drop of tears will pay off one.
一个笑就击败了一辈子，一滴泪就还清了一个人。
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