The function should match a set of repeatable business tasks.
功能应该与一组可重复的业务任务匹配。
The facade is a class that provides a set of methods that can create data objects from the back end, or provide some other business function.
虚包是包含一套方法的类，利用它，你可以从后台创建数据对象，或提供一些其它的业务功能。
The system could carry out the function of the business enterprise IM system: increase the contact person, define the set, on-line chat and community exchanges.
实现了企业IM软件系统的功能：添加联系人，定义组，在线聊天和群体交流。
The system could carry out the function of the business enterprise IM system: increase the contact person, define the set, on-line chat and community exchanges.
实现了企业IM软件系统的功能：添加联系人，定义组，在线聊天和群体交流。
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