| 词汇 | trackball |
| 释义 | trackball 1 ENTRIES FOUND: trackball (noun) trackball /ˈtrækˌbɑːl/ noun plural trackballs trackball /ˈtrækˌbɑːl/ noun plural trackballs Learner's definition of TRACKBALL [count] computers : a device which consists of a small ball that you roll with your fingers to control the movement of a pointer on a computer screen跟踪球（用手指旋转，以控制电脑显示屏上光标移动的装置） |
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