For, in order to build the immense diversity of living systems, nature has made use of a strictly limited number of building blocks. 自然界仅用十分有限的建筑材料，便造就出千差万别的生命系统。
Regulatory decisions affect a wide variety of private interests, and the government's justifications for summary action also differ from one setting to the next. 管理性决定影响到各种私人利益，而且政府采取即决行动的理由也是依具体情况而千差万别的。
