Virtual Track ball 虚拟轨迹球
Optical track ball 松下原装轨迹球
track-ball pointer 跟踪球式指示器
track ball pointer 转球式指示器
track-ball support 跟踪球的支持
Ball Track 球沟道 ; 钢球沟道 ; [机] 轴承滚道
Track the ball 轨迹球
track-rod ball plug 横联杆球塞
N-COUNT A trackball is a ball on some computers that you turn in order to move the cursor. 追踪球 [计算机]
Dopamine receptors seem to track possibilities—an arcing tennis ball that may land in or out—and how expected or unexpected they are.
多巴胺受体有着跟踪潜力—网球的弧线球会落在界内还是界外—是怎样期待还是不期待他们的出现。
We made a special ball, with a bell in it, so the kids can keep track of where the ball is and what it's doing by listening for it.
我们做了一个特殊的足球，里面带一个铃铛。这样通过铃铛声音，孩子们可以跟着球跑并能判断出赛场情况。
If touch isn't your thing, the phone also has a slide-out keyboard that works well enough, as well as five navigation buttons and a track ball.
如果对你来说屏幕不是问题的话，这个手机还有一个工作的够好的滑盖键盘以及五维导向按钮和轨迹球。
应用推荐