It was extremely important to design interfaces that are simple to invoke from an application, and are flexible enough to allow IBM to potentially support additional object types in the future.
在设计接口上有一点是非常重要的，就是这些接口既很容易被应用程序调用，又具有足够的灵活性，能够使IBM可以在将来支持其他对象类型。
Thus, it can be convenient to have an additional object that handles instantiation of the actual object instead of having the client create the object directly.
这样，有一个额外的对象来处理实际对象的实例化而不是让客户端直接创建对象会更方便。
Thus, it can be convenient to have an additional object that handles instantiation of the actual object instead of having the client create the object directly.
这样，有一个额外的对象来处理实际对象的实例化而不是让客户端直接创建对象会更方便。
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