添加过渡动画，当前位置导航栏，和进度条来帮助用户确定他们在何处，以及发生了什么。
Adding transition animations, breadcrumbs, and progress gauges help the user to identify where in the application they are, and what's happening.
在页面顶端的，是搜索栏和导航条。
Right at the top of the page is the navigation, together with search.
如果您设置的推荐列表高度数少于返回的数目，将会在下拉栏中自动显示垂直滚动条。
If you set the height of the suggestion list to a number less than the number that is returned, that will automatically turn on vertical scrolling in the dropdown.
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