释义：adj.楼上的；adv.在楼上，往楼上，高水平地，上层地，头脑上地；n.楼上
例句：He would prefer to meet me downstairs rather than upstairs. 他宁愿在楼下见我，而不愿在楼上。I think I'll go upstairs and have a sleep. 我想上楼去睡一觉。