Performance impacts result if objects must be created for each argument of each EJB method.
如果必须为每个EJB 方法的每个参数创建对象，则会带来性能影响。
If objects in another schema depend on an object being dropped, the default drop statement semantics apply.
如果另一个模式中的对象依赖于被删除的对象，那么应用默认的drop语句语义。
If objects and inheritance go together like chocolate and peanut butter, objects and polymorphism are like hand and glove.
如果说对象和继承就像巧克力和花生酱的话，那对象和多态就好比手和手套。
If objects and inheritance go together like chocolate and peanut butter, objects and polymorphism are like hand and glove.
如果说对象和继承就像巧克力和花生酱的话，那对象和多态就好比手和手套。
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