说明：  一个ComboBox中，如果可以带多列的数据，并且都显示出来，有时，会很有用的。这样，可以增强界面的表达能力和少占据界面的空间。下面就介绍一款这样的控件。
(A ComboBox, if you can bring more disaggregated data, and are displayed, and sometimes will be very useful. In this way, the interface can enhance the expression of capacity and interfaces to occupy less space. Here s a way to introduce controls.)