Step 2: Keyboard navigation and visual focus.
步骤2：键盘导航和可视焦点。
Each element receives keyboard focus, as long as it is a navigation stop.
对于每个元素，只要它是导航停止位，就可以接收键盘焦点。
Display access keys to provide a keyboard alternative to the mouse for menu navigation.
显示访问键以提供代替鼠标进行菜单导航的键盘。
Display access keys to provide a keyboard alternative to the mouse for menu navigation.
显示访问键以提供代替鼠标进行菜单导航的键盘。
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