top对象类是LDAP中所有对象类的基类。
The top object class is the base class for all object classes in LDAP.
一个对象，用于提供对父对象的基类列表的访问。
An object providing access to the base class list of the parent object.
基类子对象可以具有零大小。
表示针对概念模型的对象查询的结果的基类。
The base class for the results of an object query against a conceptual model.
这是其他从不实例化的代码表达式对象的基类。
This is a base class for other code expression objects that is never instantiated.
虽然你叫它的子类对象，它将只运行基类的实现。
Though you call it with sub class object, it will run only base class implementation.
构造派生类对象时，就记住了基类。
When the class object is constructed, the base class is remembered.
构造派生类对象时，就记住了基类。
When the class object is constructed, the base class is remembered.
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