a hand-held button-activated input device that when rolled along a flat surface directs an indicator to move correspondingly about a computer screen allowing the operator to move the indicator freely as to select operations or manipulate text or graphics
一种按按钮激活的手持式输入装置,当在平面上滚动时,指示指示器相应地在计算机屏幕上移动,使操作员可以自由地移动指示指示器以选择操作或操作文本或图形
以上为机器翻译结果,长、整句建议使用 人工翻译 。
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