Notice how the tooltips appear and disappear as you move your cursor over the elements.
注意当光标在元素上移动时工具提示是如何出现和消失的。
ToolTips are modeless online help, and they are incredibly effective.
工具提示是非模态的在线帮助，其效果好得不可思议。
ToolTips are modeless online help, and they are incredibly effective.
工具提示是非模态的在线帮助，其效果好得不可思议。
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