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词汇 trackball
释义
trackball
noun [ C ] uk/ˈtræk.bɔːl/ us/ˈtræk.bɔːl/
(电脑键盘上操控光标的)轨迹球
a ball on a computer mouse or keyboard that you roll with your finger in order to move the cursor on the screen
A mouse or trackball allows you to move the pointer that is on the screen and to select items by clicking on them.
Even seasoned computer users found the mixture of keyboard, touchscreen and trackball confusing.
    更多例句
  • The icons are generally activated by an on-screen pointer controlled by a mouse or trackball.
  • Two large buttons sit on either side of the trackball and replicate the left and right mouse buttons.
  • The idea was to grasp the stick in the palm of the hand and manipulate the trackball with the thumb.
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