RIM目前在中国市场只有一款老式的8700型，是用拨盘阅读电子邮件和浏览网页，而非迷你轨迹球（Trackball Mouse），远远落后于诺基亚和iPhone等的新型手机使用的科技。
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They use a trackball to move the cursor and scroll the screen, but it is more like cursor-key functionality rather than a mouse pointer.
它们使用轨迹球移动指针和滚动屏幕，但是这更像是指针-键功能而不是鼠标指针。
Beyond motion sensing, which a mouse rolling on its trackball already does handily, or iPhone pinching, gesture sensing can allow movement in three dimensions.
鼠标的滚轮和ipone都可以进行动作感应，但是只有手势感应允许动作在三维空间内进行。
Move your mouse or trackball in the straightest line possible.
尽可能在最直的线上移动您的鼠标或轨迹球。
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