For starters, you must rely on the authors of child classes to understand that they must implement both import and export so as not to create classes in a broken state.

对于启动器，您必须依赖子类的作者来理解它们必须实现import和export，才能在broken状态创建类。

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During his campaign, President George W. Bush called the export-control system "broken, " though he has yet to take a stand on the MTOPS issue.

CNN: Turning the U.S. into a super-computer power