这是一个行之有效的原则，一个大型软件系统的最佳结构是一个模块化的。
It is a well-established principle that the best structure for a large software system is a modular one.
福建：当您的建筑师一个大型软件系统，什么是最关键问题3你要照顾第一次通常？
FJ: When you architect a large software system, what are the top 3 key issues you have to take care of first typically?
PD M作为一个大型软件系统，涉及到许多IT技术，必须遵照软件工程的方法来进行开发。
As a large scale software system, PDM related to many it technology, and it must be developed under software engineering technology.
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