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。
Using a computer mouse or trackball can be a little tricky.
使用鼠标或者轨迹球有时候会有一点点儿棘手。
Use a computer mouse or trackball may be a little tricky.
使用电脑鼠标或轨迹球鼠标有时候非常棘手。
Use a computer mouse or trackball may be a little tricky.
使用电脑鼠标或轨迹球鼠标有时候非常棘手。
应用推荐