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trackball

1 ENTRIES FOUND:
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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