先是有了滚轮鼠、然后橡皮球-可允许更平滑地移动，不过容易粘上污垢-现在有了给桌面拍照的微型照相机（译者：指光电鼠标）。
There were trackwheels, then rubber balls - which allowed smoother movement, but got gummed up with dirt - and now mini-cameras that film the table top.
您可以在移动鼠标滚轮的同时，通过按ctrl键来放大或者缩小图表。
You can zoom in or out of a diagram by pressing the Ctrl key while moving the mouse wheel.
JScrollPane组件甚至随预注册的侦听器一起提供，所以当这个组件获得焦点且用户移动鼠标滚轮时窗格将会滚动。
The JScrollPane component even comes with a pre-registered listener, so the pane will scroll when it has focus and the user moves the wheel.
按下鼠标右键同时使用鼠标滚轮可以改变移动速度。
With the mouse button held down, you can use the mouse-wheel to change your movement speed.
旁边鼠标的滚轮，你也可以使用左箭头和右箭头键移动通过堆栈窗口。
Beside mouse's scroll wheel, you can also use the Left Arrow and Right Arrow keys to move through the stack of Windows.
其它突出特征是，它没有能让使用者快速上下移动网页或文件的传统滚轮。
Its other striking feature is the lack of a traditional "scroll" wheel, designed to enable users to move quickly up and down a web page or a document.
动力机由支 架上的滚轮支撑于微型割晒机机架的导轨上，动力机的移动带着切 割刀具沿导轨作横向切割；
The power machine is supported on a guide rail of the minisize windrower frame by rollers; and the movement of the power machine drives the cutter to move transversally along the guide rail;
至于滚轮机械人，因为不必浪费宝贵的运算能力来处理平衡问题，便能对移动的球即时反应。
The wheeled robots, which don't have to fritter precious computational power on balancing, can react in real time to moving balls.
为了便于手持式电动剪刀的移动，在剪刀身的底部适当的位置安装适当数量的滚轮。
In order to move the hand-held electric shears conveniently, proper positions at the bottoms of the shear bodies are provided with a proper amount of rollers.
焊件移动或变位机构，如焊接滚轮架，头尾架翻转机，回转平台和变位机等，精密型的移动变位机构应配伺服电动机驱动。
3 mobile or welding positioner, such as welding roller frame, frame head and tail flip machine, rotary platform and positioner, mobile precision displacement mechanism should drive with servo motor.
一种用于抽屉的滑轨装置，是由固定滑条、移动滑条和由装在其滑条上的滚轮组成。
The utility model discloses a slide rail device for drawers, comprising fixed slide bars, movable slide bars, and rolling wheels which are arranged on the slide bars.
一种用于抽屉的滑轨装置，是由固定滑条、移动滑条和由装在其滑条上的滚轮组成。
The utility model discloses a slide rail device for drawers, comprising fixed slide bars, movable slide bars, and rolling wheels which are arranged on the slide bars.
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