If this is the interface pass, output all the class instance variables.

如果这是接口部分，那么输出所有类实例的变量。

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Using introduction, aspects can add new methods and variables to a class, declare that a class implements an interface, or convert checked to unchecked exceptions.

使用引入(Introduction)，Aspect可以向类中添加新的方法和变量、声明一个类实现一个接口或将检查异常转换为未检查异常(unchecked exception)。

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Well, an abstract class can have non-static variables, and an interface can't.

抽象类可以有非静态变量，而接口不可以有。

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Well, an abstract class can have non-static variables, and an interface can't.

抽象类可以有非静态变量，而接口不可以有。

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