欲将光标作不规则移动时,必须使用鼠标。尽管鼠标已有多种形式的新产品问世,但是它们均要使用一个跟踪球作为关键的运动部件。用过一段时间后,由于跟踪球及相关部件脏了,光标的运动就不灵活了。微软公司推出的一种新型鼠标,没有跟踪球和其他运动部件,用光学传感元件和数字信号处理器来跟踪使用者手指的动作。由于没有了跟踪球,这种鼠标可以放在任何表面上使用,即使放在膝上也照样能使用。 To make the cursor irregular movement, you must use the mouse. Despite the many new mouse products that have come out, they all use a trackball as their key moving part. After a period of time, the movement of the cursor is not flexible due to the dirty trackball and related components. Microsoft introduced a new mouse that does not track balls and other moving parts and uses optical sensing elements and digital signal processors to track the user’s finger movements. With no trackball, this mouse can be used on any surface, even on your lap.