trackball

From Longman Dictionary of Contemporary EnglishRelated topics: Computerstrackballtrack‧ball /ˈtrækbɔːl $ -bɒːl/ noun [countable] TDa small ball connected to a computer, that you turn in order to move the cursorExamples from the Corpustrackball• The reason that conventional trackballs and joysticks aren't used is because the precise positioning that they provide simply isn't needed.• The icons are generally activated by an on-screen pointer controlled by a mouse or trackball.• Klatsky found that some subjects preferred trackballs or Glidepoint pads even though they actually performed better with mice.

单词	trackball
释义	trackball From Longman Dictionary of Contemporary EnglishRelated topics: Computerstrackballtrack‧ball /ˈtrækbɔːl $ -bɒːl/ noun [countable] TDa small ball connected to a computer, that you turn in order to move the cursorExamples from the Corpustrackball• The reason that conventional trackballs and joysticks aren't used is because the precise positioning that they provide simply isn't needed.• The icons are generally activated by an on-screen pointer controlled by a mouse or trackball.• Klatsky found that some subjects preferred trackballs or Glidepoint pads even though they actually performed better with mice.
随便看	the field (of battle) the field of battle the fifties the filth the final etc indignity the final etc round the final part etc the final sacrifice the final shakedown the final stretch the final word the final/supreme/ultimate sacrifice the final/ultimate/crowning etc indignity the finals the financial burden switched on switched-on switchedon switchel switching Switzerland swivel swivel around swivel around/round swivel chair