Place mouse or track ball next to keyboard.
将鼠标器或跟踪球放在键盘旁。
Input devices include keyboards and pointing devices such as mouse, joystick, track ball, or light pen.
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.
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。
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