adv.在楼上,往楼上;在高空;
n.楼上;
英文例句/中文翻译:
He went upstairs and changed into fresh clothes...
他上楼换上干净衣服。
She's upstairs in bed feeling ill.
她身体不舒服,在楼上躺着。
He is waiting in the upstairs hall.
他正在楼上的大厅里等候.