| 释义 |
track ball
基本英英例句
🖲跟踪球
名词 trackball:
an electronic device consisting of a rotatable ball in a housing; used to position the cursor and move images on a computer screenInput 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。 |