Mouse support has two main USES: coordinate tracking, and zooming.

鼠标支持有两个主要用途：坐标跟踪和缩放。

youdao

SVG supports all of the mouse events you expect but also has support for keyboard events -- even for specific key events, which is what I've chosen to demonstrate here.

SVG 支持您所期望的所有鼠标事件，但是也支持键盘事件，甚至还支持特定的按键事件，最后一种情况就是我选择将在这里证实的情况。

youdao

Mice with a scroll wheel as a middle mouse button are fairly popular, so support is being added.

用一个滚动轮作为鼠标中键的鼠标非常流行，所以增加了对它的支持。

youdao

Full mouse support: left and right clicks, dragging, scrolling, precision pointer movement.

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Oculus Rift's Tuscany demo was built with a good ol' fashioned keyboard and mouse setup in mind, but now it's unofficially scored support for motion controls.

ENGADGET

With USB support in the SmartDock, they can also use a wireless keyboard and mouse to write emails, browse and post on Facebook or watch videos from YouTube on their TV.

ENGADGET: Sony officially debuts Xperia U at MWC 2012 Mobile