Setting the class combines the image Sprite info from the CSS with the link, showing only that region of the Sprite.

用CSS和链接设置类，将精灵的信息组合起来，只显示精灵的一部分。

youdao

Setting the class combines the image Sprite info from the CSS with the link, showing only that region of the Sprite.

用CSS和链接设置类，将精灵的信息组合起来，只显示精灵的一部分。

youdao