信号是一种有效和灵活的“粘合剂”，它们把程序中的对象“粘合”在一起。
Signals are the efficient and flexible glue that tie the objects in your program together.
类似地，第二行把cb _ button_click函数连接到button对象的clicked信号。
Similarly, the second line connects the cb_button_click function to the clicked signal on the button object.
第一行把cb_delete函数连接到window对象的delete - event信号。
The first line connects the cb_delete function to the delete-event signal on the window object.
对一个已经设置为有信号状态的事件对象再次执行该函数是无效的。
只需要将一个对象的信号连接到另一个对象的方法。
The signal of one object simply needs to be connected to the method of another.
滤波对象必须是满足一定要求的矢量信号。
The filter object must be a vector signal satisfied the certain request.
滤波对象必须是满足一定要求的矢量信号。
The filter object must be a vector signal satisfied the certain request.
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