The requisition port can use any class to define its type.
请求端口能够使用任何类来定义它的类型。
The more you put into a class, any class, the more you’ll get out of it.
不管什么样的课程，你投入的时间越多，理解的也就越多。
However, any class that will be used more than once should be in a package.
但需要多次使用的类必须要放到包中。
We don't have any class today.
我们今天不上课。
You can add a member function to any class using Class View.
可以使用类视图将成员函数添加到任何类。
You can add a member function to any class using Class View.
可以使用类视图将成员函数添加到任何类。
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