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track ball的英文翻译是什么意思，词典释义与在线翻译：
英英释义
名词 trackball:
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an electronic device consisting of a rotatable ball in a housing; used to position the cursor and move images on a computer screen
track ball的用法和样例：
例句
- 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。
