新物种不过是早先物种的突变体。

New species are merely mutants of earlier ones.

《柯林斯英汉双解大词典》

由于这是一种新的作用机制，这些化合物对多种耐药变体具有

Since it is a new mechanism of action, these compounds are active against multi-drug resistant variants.

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尽管经常与敏捷过程连接在一起，例如极限编程，但是概念和实践都不是什么新的——只是众所周知的软件开发最佳实践上的一种变体。

Although often linked with Agile processes, such as eXtreme programming, the concept and practices are nothing new — just a variation on well-known software development best practices.

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