Notice that then, in the body of the loop, I use callback to invoke the passed parameter function object.

然后请注意，在循环体中，我使用callback来调用传递的参数函数对象。

youdao

The following code sample shows the use of the callback handler.

下面的代码展示了回调处理程序的使用方法。

youdao

An alternative to this is to develop and use a custom callback handler in the application login module responsible for collecting the information.

另一种方法是，在应用程序登录模块中开发和使用负责收集信息的自定义回调处理程序。

youdao

And I don't want to deprive the 6.2 million citizens of Hong Kong of the choice to use IDD or callback.

CNN: Getting Ready for 1997