How to define members of a sealed abstract class in a nice way?
如何在一个很好的方式定义一个密封的抽象类的成员？
Is it poor design to declare a class abstract because it only has static members?
它是糟糕设计声明一个抽象类，因为它只有静态成员?。
All abstract members from the base class are implemented in the derived class.
基类中的所有抽象成员都在派生类中实现。
The abstract class contains abstract members.
抽象类包含抽象成员。
Members marked as abstract, or included in an abstract class, must be implemented by classes that derive from the abstract class.
标记为抽象或包含在抽象类中的成员必须通过从抽象类派生的类来实现。
When a nonabstract class is derived from an abstract class, the nonabstract class must include actual implementations of all inherited abstract members, thereby overriding those abstract members.
当非抽象类继承一个抽象 类 时，非抽象 类必须包含所有继承的抽象成员的实现，因此覆盖所有的抽象成员。
An interface is like an abstract base class: any non-abstract type that implements the interface must implement all its members.
接口是一个抽象基类，如：实现接口的任何非抽象类型必须实现它的所有成员。
If the parent class is an abstract class and if it contains at least one abstract member, then all abstract members will be implemented as non-abstract inheriting classes.
如果父类是抽象类且至少包含一个抽象成员，则所有这些成员都将作为非抽象的继承类实现。
An abstract class must provide implementation for all interface members.
抽象类必须为所有接口成员提供实现。
An abstract class must provide implementation for all interface members.
抽象类必须为所有接口成员提供实现。
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