MOST people regard grammar books and dictionaries as a codified set of rules prescribing DOS and don 'ts.

大多数人把语法书籍和字典当作是编纂好的一套规则，规定着孰是孰非。

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If you have weak or brittle nails, understand the do's and don 'ts of various nail care products.

如果你的指甲柔弱易损，要知道不同指甲保健产品的须知有哪些。

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Some preschool directors offered several do's and don 'ts.

几位幼儿园主管提出了一些注意事项。

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For example, the New York State Department of Environmental Conservation lists some dos and don'ts of composting on its Web site: Do add lime, small amounts of wood ashes or crushed eggshells to the compost pile.

VOA: special.2009.06.23

Books that give a kind of guide to the dos and don'ts of princely behavior.

这种书籍指引君主行为,该做与不该做的事。

耶鲁公开课 - 政治哲学导论课程节选

To reinforce her message, Dame Sally has issued a list of "dos and don'ts".

BBC: Antibiotic resistance 'big threat to health'

Here, from her and other breast cancer authorities, are the do's and don'ts of genetic testing.

CNN: Should I test my breasts?

Mr. Sanislo's experience reflects some of the dos and don'ts for would-be do-it-yourself car mechanics.

WSJ: Diagnostic Tools to Unleash Your Inner Mechanic