如果您只想在遇到未定义的情况时抛出异常，那么就没必要使用落后的 (object,object) 模式对 x_with_y()进行初始化。
The initialization of x_with_y() with a fallback (object,object) pattern is not necessary if you simply want undefined cases to raise an exception.
然而，这两种模式并未定义这些依赖项组件方法的设计方式。
However, the patterns don't define the design of these dependency components' methods.
此模式适合在document样式的WSDL中使用，但并不适合rpc样式，因为未定义全局级别的类型。
This schema fits into a document-style WSDL but is not well suited for RPC style since there is no global level type defined.
建议模式的使用时机，是在尚未定义类别和成员前就要使用这些类别和成员的时候。
Use suggestion mode when classes and members are used before they are defined.
建议模式的使用时机，是在尚未定义类别和成员前就要使用这些类别和成员的时候。
Use suggestion mode when classes and members are used before they are defined.
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