键盘上的tab键,用来切换焦点,同时在早期字处理器中是制表符。tab[tAb]n.(供手拉或悬挂的)短小的突出物Hang your jacket up by the tab.把你的外衣挂在衣钩上。易拉罐拉环to open the can by pulling the tab拉环开罐标签;铭牌Before my first day at school my mother sewed tabs on all my clothes with my name on.入学前一天,妈妈在我所有的衣服上缝上带有我名字的标签。(AmE.) 账单;费用The tab for superhighways may run as high as 2 million dollars a kilometer.造超级高速公路的费用可能达到每公里200万美元之上。