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。

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Table per-class: (Optional) Each concrete subclass is mapped to a table and contains columns for super class attributes.

按类表：(可选)每个具体的子类映射到一个表，并且包含超类属性的列。

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With this class as a super class, there are only three methods that should be overridden.

因为该类是一个超类，所以只有三个应该被忽略的方法。

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