TwoScreen

same up down. 使用：点击twoscreen小图标，分成两个小页面。再次点击，就去还原。 into with divide two read restore. left use: on two page the click again can be that small the into small and icon content small same and right, so the the click the 将同一个页面分成左右两个内容相同的小页面，方便网页上下对照阅读。 to twoscreen page pages. pages to split