There are three rules for writing a novel. Unfortunately, no one knows what they are.

写小说要遵循三条原则。但不幸的是，没人知道这些规则。

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The rules for writing an abstract are almost the same to those for writing the summary for an investigation report.

摘要的写作规则与调查报告概要的写作规则极为相似。

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There are several additional rules for writing string constants that allow you to include special characters (such as quotation marks) within the string.

有一些额外的规则可以让你书写包含特殊字符（例如双引号）的字符串。

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For example, writing centers can help teach the rules of American academic writing.

VOA: special.2009.07.16

Employers, however, need to be careful to put these rules in writing for how and when executives can defer income, and then the rules must be followed in practice.

FORBES

Which, of course, does not absolve the government from responsibility for writing tax rules in such a way as to prevent companies paying significantly less than the official corporation tax rate - which, of course, is not easy in a globalised world where businesses can move their domiciles and can shunt revenues more or less wherever they choose.

BBC: The tax choices faced by companies

And throughout all of this the gulf carriers continue doing ad hoc deals where necessary (Emirates talking to American, for instance) and re-writing the rules.

CNN: Airlines of the gulf: Shaking up the skies