| 1. | Class is abstract , you cannot create an instance of an
类为抽象类，所以不能使用 |
| 2. | For this reason , it cannot also be an abstract class
因此，它也不能是抽象类。 |
| 3. | Class is abstract , you cannot create an instance of
类是抽象类，因此不能直接使用 |
| 4. | The base abstract classes consist of the following
基本抽象类由以下内容组成： |
| 5. | Which is a member of a non - abstract class
提供，此重写方法是非抽象类的一个成员。 |
| 6. | Is an abstract class that contains common behavior for the
类的通用行为的抽象类。 |
| 7. | Class itself is abstract and cannot be instantiated
类本身是抽象类，不能实例化。 |
| 8. | Abstract classes may also define abstract methods
抽象类也可以定义抽象方法。 |
| 9. | As an abstract class , it cannot be instantiated
作为抽象类，该类不能实例化。 |
| 10. | For more information about abstract classes , see
有关抽象类的更多信息，请参见 |
