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代码说明：

  动画效果很强，在高 版本浏览器下浏览，就像是flash动画一样低版本浏览器下，只能是类似网页一样的效果，可以上下拖动，不过UI同样很漂亮(The animation effect is very strong, browsing in the high version browser, like flash animation in the low version browser, can only be similar to the web page effect, can be dragged up and down, but the UI is also very beautiful)