If we haven't yet figured out how to tame our need to eat, one reason may be that ghrelin, leptin and the handful of other gut chemicals are only the big dogs of the appetite-control system.
如果说为什么我们还没有驯服食欲，理由之一也许在于生长激素释放肽、瘦素和少数一些其它肠化学物质只是胃口控制机制中的几个重要方面。
Hundreds of thousands of years ago, man began to tame wild dogs. After the dogs were tamed, they were trained.
几千年前人类就开始驯服野狗，狗被驯服后，人们就训练它们。
Hundreds of thousands of years ago, man began to tame wild dogs. After the dogs were tamed, they were trained.
几千年前人类就开始驯服野狗，狗被驯服后，人们就训练它们。
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