的确，在相对的基础上，上四年大学的回报正在接近其历史高位，但在很大程度上，(出现这种现象的原因)是针对没有大学学历的人的预期一直是走平或下跌的。
Indeed, on a relative basis, the return on a four-year degree is near its historic high. But that's largely because the prospects facing people without a college degree have been flat or falling.
自古以来人们普遍接受这种观点：婴儿或别的生灵学会做事情是由于某些行动得到了“回报”，也没有理由对这种真相表示疑问。
For some time past it has been widely accepted that babies — and other creatures — learn to do things because certain ACTS lead to "rewards" and there is no reason to doubt that this is true.
总而言之，不管是做好事有回报，或没有，最重要的是当被人陷入困境的时候，应该第一时间毫无犹豫的帮助他人。
To sum up, No matterdoing good deeds should get returns or not, the most important thing is when others being in trouble, we should to help them without hesitate.
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