adv.在楼上，往楼上；在高空；adj.楼上的；n.楼上； 变形： 复数：upstairs 双语释义：adv.(副词)在楼上,往楼上 up the stairs; on an upper flooradj.(形容词)[A] 楼上的 situated on, living on or belonging to an upper floorn.(名词)[S] 楼上 upper floor of a house, etc.英英释义： upstairs[ 'ʌp'stεəz ]n.the part of a bu