第一种方法是对代码进行一套完全彻底的单元测试：在重构之前和之后都必须通过这样的测试。
One way is to have a thorough set of unit tests for the code: the code should pass the tests both before and after refactoring.
我不再相信放松管制可以是完全的彻底的成功了。
I no longer believe that deregulation has been a complete, an unqualified, success.
最后一点：新的焦点模型与当前各个版本不是完全向后兼容的，所以现有的应用程序将需要彻底的测试。
One final note: The new focus model is not completely backwards-compatible with current versions, so existing applications will need to be thoroughly tested.
应用推荐