基于物种关系的一个分析表明，进化路线有时是从有斑点到无斑点，有时又反过来，这取决于栖息地在哪里。
An analysis based on the relationship between the species, though, shows that evolutionary lines can swap from spots to no spots, and vice versa, as the habitat dictates.
在大约四亿年前，现代鱼类的早期祖先沿着新分出的进化路线演化成了现代哺乳动物的早期祖先。
About 400 million years ago, the earliest ancestors of modern fish split off of the evolutionary pathway that became the earliest ancestors of modern mammals.
本文将两种蛋白质设计策略的特点、各自使用的方法、进化路线及最近三年在酶工程改造上取得的成就加以总结。
This article summarized the characteristics, evolution approach, evolution routines and the successful examples of the two protein modification strategies.
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