这种动态效果出现在同时具有左、右导航菜单的网站。
The effect appears in both left - and right-side navigation menus.
现代派的真经是破除左导航、右导航的纠结，让用户尽可能专注在页面内容上，而不要被分心！
The modern mantra is to do away with left-nav and right-nav and keep the user as occupied as possible on page content rather than distractions!
然而PlayBook的触摸感应并没有延伸到右挡板，这里摸上去感觉很不错，因为这里是重要的导航按钮。
The touch on the PlayBook does extend right across the bezel though, which is a nice touch and pretty important for navigating around the OS.
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