Tipping is the most prominent underlying rule in American society. Doormen in hotel, waiters in restaurant are paid with relatively low salary by their managers.

小费大概得算上美国社会最重要的“潜规则”，对于酒店的门童、餐馆的服务员，老板有意会付比较低的工资，小费成了他们主要的收入。

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Perhaps, the tip might be regarded as the most important underlying rule in America. The bosses of the restaurants will prefer to offer a low pay to the doormen and the waiters.

小费大概得算上美国社会最重要的“潜规则”，对于酒店的门童、餐馆的服务员，老板有意会付比较低的工资，小费成了他们主要的收入。

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This rule, and the rule to do one thing, are both corollaries of an underlying principle: avoid duplication of code whenever possible.

这条规则，以及做好一件事情的规则，都是一个根本原理的必然结果：无论何时都要尽可能避免代码重复。

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The Americans and Europeans want Russia to support a managed transition, in which President Bashar Assad would leave power but some of the underlying structures linked to his rule would remain in place.

ECONOMIST: Russia and America

But anyone can enhance their creative abilities simply by understanding the underlying principles and grasping one very important rule.

FORBES: Need Some New Ideas? Consult your SWAMI!

But they do not really bear out the assertion that the rule of law is an underlying prerequisite for growth.

ECONOMIST: Economics and the rule of law