4使用隐式多态实现每个具体类一张表。

Table per Concrete Class using Implicit polymorphism.

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采用混合策略，例如“每个类层次一张表”中嵌入“每个子类一张表”，这样可以利用不同策略的优势。

Mixing strategies such as "Table per Subclass" embedded in "Table per class Hierarchy" so that you can take advantages of different strategies.

youdao

“使用隐式多态实现每个具体类一张表”这种做法并不推荐，因为其配置过于繁缛、使用“any”元素的复杂关联语法和隐式查询的潜在危险性。

"Table per Concrete Class using implicit Polymorphism" is not recommended due to its verbose configurations, complex association syntax using "any" element and potentially dangerous implicit queries.

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