at英 [ət] 美 [æt,ət] prep.（表示位置）在;在（某时间或时刻）;以，达; 向，朝例如：at the corner of the street在街角We changed at Crewe.我们在克鲁换的车。They arrived late at the airport.他们晚到了机场。At the roundabout take the third exit.在环岛处走第三个出口。I'll be at home all morning.我一上午都在家。She's at Tom's (= at Tom's house) .她在汤姆家中。
jarvinia奈奈
