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