Bill Venners: in your book, Refactoring you say, "the code says everything once and only once, which is the essence of good design."

比尔：你在《重构》一书中提到：“代码应该实现任何逻辑一次且仅一次，这是良好设计的要素”。

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Bill Venners : You say in your book Refactoring: "If you want to refactor, the essential precondition is having solid tests."

比尔：你在《重构》这本书里写道：“如果你打算重构，那么最根本的先决条件是有完善的测试。”

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Bill Venners : You say in Refactoring, "The secret to fast software in all but hard real time contexts is to write tunable software first, and then to tune it for sufficient speed."

你在《重构》一书中写道：“编写能快速运行的软件的秘诀就在于先编写可性能调优的软件，然后对执行速度进行调优。”

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