1·Schema deletion failed: class is used as sub class.
架构更新失败：类别作为子类别使用。
2·Yes, if the super class implements serializable, then so do the sub classes.
是的，如果超类实现序列化，那么子类。
3·Though you call it with sub class object, it will run only base class implementation.
虽然你叫它的子类对象，它将只运行基类的实现。
4·Here is an example of mapping a super class and a sub class using the single table strategy.
下面是一个使用单表策略映射超类和子类的示例。
5·If a Sub class is Serializable, it absolutely does not mean that its super class is also Serializable.
如果子类是可序列化的，它绝不意味着其超类是可序列化的。
6·Abstract methods used when one method can implement in more than one sub class with different implementation.
抽象方法时使用一个方法可以实现在多个接头与不同的实现类。
7·But if you want to prevent sub class whose superclass is serializable to be serializable it is also possible.
但是如果你想防止子类的超类是可序列化的可序列化的也可以。
8·When you call a method which is defined in both sub class and base class then it will invoke a method based on the object you are passing.
当你调用一个方法是定义在子类和基类，然后它会调用一个基于对象要通过法。
9·In your given example program1, display method is defined in both base and sub classes and you are trying to invoke it with the sub class object.
在你给的例子程序1，显示的方法是在基站和子类的定义和你试图调用它的子类对象。
10·Especially, science fiction is a sub-class of prose fiction, for nearly every piece of science fiction is either a short story or a novel.
特别是，科幻小说是散文小说的一个子类，因为几乎每一部科幻小说都是短篇或长篇小说。