对某人有利益或有好处 worth one's while
每个牧民都为了获取狭隘的利益而不断地增加更多的奶牛，因为每个牧民都享有额外奶牛的所有利益，而额外奶牛对牧场的影响却由所有的牧民共同分担。
It was in each herder's narrow interest to keep adding more cows, since each enjoyed all the benefits of an extra cow, while the effects of the extra cow on the pasture were Shared by all.
看起来如此自然的对双方都有利的利益上的交流在互惠发生之前也同样给人们的生活造成了阻碍。
That exchange of favors that seems so natural with benefits for both parties is also, unfortunately, what gets in people's way before reciprocity ever occurs.
他认为个人的利益并不总是对社会有利，并利用深入调研(作者称之为“基于现实的经济学”)加以证明。
Individual self interest does not always benefit society, he argues, and draws on a deep pool of research (what he calls "reality-based economics") to support his case.
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