由于属性发布是在代码级别完成的，因此即使不显示也可以访问字段。
Because property publication is done at a code level, the fields are accessible even though they are not displayed.
由于组件不能在代码级别进行互操作，因此不适合使用传统的单元测试方法。
Because components don't interoperate at a code level, traditional methods of unit testing are not necessarily appropriate.
由于API的级别很低，因此套接字编程不适于处理复杂的数据类型。
Because the API is low level, socket programming isn't suitable for dealing with complex data types.
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