In particular, I want to refer to the methods that perform the functions required when the Add or Clear buttons are pressed.

具体地说，我希望引用在单击add或Clear按钮时需要执行的函数。

youdao

The press procedure kicks in when most of the GUI buttons are pressed.

当按下大多数GUI按钮时，将使用press过程。

youdao

True, there are no buttons getting pressed, and no text fields getting typed in, but on a higher level, events are taking place.

没错，这没有按钮点击操作，也没有向文本字段键入的操作，但在一个更高的层面上，事件正在 发生。

youdao