有效地解决了多层软件体系结构存在的问题，实现了构件对象模型的智能化管理，且更利于软件系统的升级与更新。

By settling these shortages effectively, it realizes the intelligent management of component object-models and facilitates the update and upgrade of the software system.

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讨论了构件对象模型(COM)的基本结构、接口规范、COM库的调用机制、安全性机制以及基本的OLE服务等问题。

The basic structure of COM, interface standard, calling mechanism of COM database, security mechanism and basic OLE service are described.

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例如，客户对象映射并不是性能测试模型的关键构件。

For example, client object maps are not a key component of the performance testing model.

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