如鼠标单击之类的事件可以作为目标。
An event, such as a mouse click, is intended for a target. For example, in the page shown in Listing 7.
它的优点是您不受限于如鼠标单击之类的预定义事件。
The advantage here is that you're not limited to predefined events such as a mouse click.
输入设备包括键盘和点击设备如鼠标，操纵杆，跟踪球或光笔。
Input devices include keyboards and pointing devices such as mouse joystick track ball or light pen.
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