trackball

noun

1. 跟踪球；光标运动球
   a device containing a ball that is used instead of a mouse to move the cursor around the screen

1. (旋动以移动光标的)跟踪球，轨迹球，光标运行球
   A trackball is a ball on some computers that you turn in order to move the cursor.

1. 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。
2. ( My right-handed editor swears by a trackball mouse in his left hand.)
   （坐在我右手边的编辑正抱怨着他左手用着的轨迹球鼠标。）
3. Just rolling the trackball on a BlackBerry-type device to scroll through e-mail will be enough to generate power and boost battery life in the future.
   将来，只要在一个类似黑莓（blackberry）的装置上旋转导航键来滚动浏览电邮，就足以产生能量为电池充电。
4. Adjust how much your pointer accelerates as you move your mouse or trackball faster.
   调整指针在您加快移动鼠标或滚球时加速多少。
5. It replaces a standard mouse or trackball PC navigation device and is much more precise and sensitive.
   它代替了标准的鼠标或轨迹球式个人电脑（pc）导航装置，更为精确，也更灵敏。
6. Added trackball support, video scaling option, portrait mode.
   时间轨迹球支持，视频缩放选项，肖像模式。
7. Troubleshooting of Trackball for TOSHIBA SSA-240 B-mode Ultrasound Instrument
   日本东芝SSA-240黑白B超轨迹球的故障维修
8. One prototype has a long touch-screen, similar to the Apple iPhone, a swivel-out full keyboard, and a trackball for navigation similar to the kind on some BlackBerrys.
   一款样机带有象iPhone那样的大触摸屏，转出式全键盘和同一些黑莓（BlackBerry）手机类似的导航球。
9. To set your Orientation, click the car and then move your mouse or trackball to make the car cross the finish line.
   要设置您的方向，请单击小汽车，然后移动鼠标或轨迹球，以便使小汽车通过终点线。
10. Using a computer mouse or trackball can be a little tricky.
    使用鼠标或轨迹球可能会稍微有点棘手。
11. 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。
12. According to index of performance, the operation performance of different pointing devices was compared. The implication of the results to the optimal ergonomic design of trackball was also discussed.
    用绩效指数比较了不同指点装置的操作绩效，对追踪球的优化设计提出了建议。
13. Research on Operation Activity of a Special Computer Pointing Device& Trackball
    一种特殊的计算机指点装置追踪球的操作活动研究
14. Using our method surface reconstruction can be well finished. Fourthly, function and character of OpenGL are introduced, and also mouse trackball algorithm. Then we explained how to implement the 3d model visualization with OpenGL programming, and also transformation and display is made.
    然后又介绍了OpenGL的功能、特点及鼠标跟踪球算法，并介绍了怎样利用OpenGL编程实现三维模型可视化，并实现三维模型的显示变换。
15. The technology relating to trackball is studied, which implement the dynamic adjustment of eye coordinate system, it can make model translation, rotation, zoom in virtual environment.
    通过对虚拟轨迹球相关技术的研究，实现了对视点系的动态调整，在虚拟环境中可以实现对模型的平移、旋转、缩放的操作。

noun

1. an electronic device consisting of a rotatable ball in a housing
   1. a trackball is essentially an upside-down mouse