It gives a degree of control to the server, as well; when the server finishes a request, it looks in the XMLHttpRequest object and specifically at the onreadystatechange property.

它也给了服务器一定程度的控制权，当服务器完成请求之后，会查看XMLHttpRequest对象，特别是onreadystatechange属性。

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GetValue requires an indexed object argument because properties can be indexed (for example if I was trying to get an Items property of a listbox control).

GetValue需要一个索引对象参数，因为属性可被索引(例如，当我试图获取Listbox控件的Items属性时)。

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Using the input and output signal, the method can model the system, and can control the dynamical property of the system with the inverse transfer function of the controlled object as the controller.

本方法以实际系统的输入输出信号为依据，实现系统建模，用被控对象传递函数的逆作为串联控制器来对系统的动态特性进行控制。

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