我们也称用来实例化对象的类为那个对象的类型。
We also call the class used to instantiate an object the type of that object.
它首先读取Services _ trackback类文件并初始化services _ trackback类的对象实例。
It begins by reading the Services_Trackback class file and initializing an object instance of the Services_Trackback class.
面向对象的概念：它是可能的更新的一个实例化的对象的类？
OOP concept: is it possible to update the class of an instantiated object?
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.
你不必通过定义一个类然后实例化该类来创建一个对象。
You don't have to define a class and instantiate it to create an object.
你不必通过定义一个类然后实例化该类来创建一个对象。
You don't have to define a class and instantiate it to create an object.
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