Increases compatibility: the core information types can be centrally maintained, and changes to the core types are reflected in all specializing types.
增加兼容性:核心的信息类型能够集中维护,用所有专门类型反映到核心类型的变化。
3
Stephen Ireland cried off with a knee problem but it was Houllier's achingly ramshackle defence which was the core problem, and the three goals City posted in the opening 27 minutes reflected as much.