只要使它更便于修改和重写就可以了。
面向对象设计便于修改，但令维护人员难以理解程序。
Object orientation facilitates changes but makes it difficult for maintainers to understand programs.
软件采用模块化结构设计，各部分简洁明了，便于修改和调试。
The software USES the modulation structural design, various part of simple and brief, which advantageous for the revision and the debugging.
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