... As An Abstract Class 作为一个抽象类 Abstract class members 抽象类成员 abstract class and 抽象类和 ...
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This indicates that the BankAccount class is an abstract class and the withdrawal method is an abstract operation.
这表示，BankAccount 类是一个抽象类，而withdrawal方法是抽象的操作。
These are the respective implementations of each abstract class and interface in the message queue framework interface package.
它们分别是消息队列框架接口包中每个抽象类和接口的实现。
When do you use an abstract class and when do you use an interface?
什么时候使用抽象类，什么时候使用接口？
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