事实上，没有中断客户机处理，可以在调用间升级和重新编译服务器上的类和方法。
In fact, classes and methods on the server can be upgraded and recompiled between calls, without interrupting client processing.
在最糟糕的情况下，如果导入的是具体的类，并且它们的行为发生更改，那么执行导入的类可能会中断！
In the worst case, if the imports are concrete classes and their behavior changes, then the class doing the importing could break!
如果这些类中的任何一个发生更改，各种表面上不相关的应用程序部分可能发生中断。
If any of these classes change, various, seemingly non-related parts of the application could break.
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