承子
承子-
您只需在数据库表上创建一个type类，然后再从父类中继承子类即可。
You simply create a type column on your database table and inherit any subclass from the parent .
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这些年画艺人父承子传，日积月累，创作了一批批富有民族风情和独特韵味的木版年画。
These pictures Zhang Zi-artist father , accumulated , creating a number of award rich ethnic customs and the unique charm of woodcut New Year pictures .
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在经济承灾子系统中，基础经济要素对城市承灾能力起着重要的辅助作用。
The basal economic factors were important to urban disaster-carrying capability in the economic sub-system .