Inpractice, this standard can be difficult to apply to organisms isolatedby distance or terrain or to plants (and, of course, fossils do notbreed).

在现实世界中，此标准可能难以应用到相距遥远的种群，由地理环境分隔的种群，或是植物种群（化石显然也无法繁殖）。

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As Vincent wrote in his essay: "Engineering is like a good song anddance. It requires a lot of coordination--and a lot of failure inpractice before the final presentation.

就像Vincent在他的随笔中写道的：“工程技术工作就象去表演很棒的歌曲和舞蹈，它需要不少的协调工作，在最终表演前还要经历不停的训练和失败。

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