单词trackball
n.: 跟踪球；光标运动球
网络: 轨迹球；追踪球；轨迹球鼠标
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
轨迹球
复数：trackballs
The trackball, which feels similar to that of the G1 and Blackberry phones, provides another quick way to get around the Web OS interface.
轨迹球的使用感觉和G1及黑莓手机差不多，提供了另外一种快速操作方式。
Adjust how much your pointer accelerates as you moveyourmouse or trackball faster.
调整指针在您加快移动鼠标或滚球时加速多少。
After backing out of the menu, an encryption key can be selected by moving the trackball and typing characters on the keyboard.
退回菜单后，通过移动轨迹球或输入键盘上的字母选择一个密钥。
Check the trackball and use a clean, soft cloth to wipe off the surface dust.
检查轨迹球并用干净、柔软的布擦去表面的灰尘。
In 2006, the scroll wheel was replaced with a trackball on the front of the device .
2006年滚轮被一个置于手机正面的轨迹球取代。
A trackball has the ball on top and you move it with your finger.
阿轨迹球有球在上面，你用手指移动它。
Remove the mouse arrow to mark the underside of the ring with a bezel, and remove the trackball.
取下鼠标底面带有箭头标记的圆环挡板，并取出轨迹球。
Users can "type" on this virtual keyboard using a mouse, trackball, or similar pointing device.
用户可以在“类型”在这个虚拟键盘使用鼠标，轨迹球，或类似的指点设备。
Control the trackball to select any question and learn how the scientists will explain.
控制轨迹球选择问题，听听科学家们是如何解释的。
pointing device : A device, such as a mouse or trackball, that enables you to select objects on the display screen.
定点设备：一种可用来在屏幕上选择对象的设备，例如鼠标或轨迹球。