trackballs

英

美 [ˈtrækˌbɔlz]

n. 跟踪球; 光标运动球
trackball的复数

(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.

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But perhaps more innovative was use of touch: no more trackballs or styluses.
不过，iPhone最创新的地方也许是对触控操作的运用：再也用不着轨迹球或触控笔了。
We think that pressing buttons, using trackballs etc.& are on their way out on mobile for mobile web apps.
我们认为对于移动应用，按按钮，使用跟踪球（Trackball）等，正慢慢地在移动设备上消亡。
Some types include digitizing tables, joysticks, trackballs, the mouse, touch panels, and light pens.
如下各种类型的设备：数字化仪、操纵杆、跟踪球、鼠标器、触板、光笔等。
Target speed has an effect on the operating controllability, stability and fatigue degree of mouse, and the index finger operating and thumb operating trackballs.
目标速度影响鼠标、食指操作追踪球和拇指操作追踪球等指点装置的操作可控性、稳定性和疲劳度。
In general speaking, mouse is better than the two trackballs and the two trackballs only have slight difference in the operating controllability and stability, but mouse is slightly higher than the two trackballs in subject operating fatigue degree.
总的来说，在操作可控性和稳定性上，鼠标优于两种追踪球，而两种追踪球间的差异较小，然而鼠标的主观操作疲劳度也略高于两种追踪球。