n. the part of a building above the ground floor
a. on or of upper floors of a building
r. on a floor above
r. with respect to the mind
a. 楼上的
adv. 在楼上, 向楼上, 处于更高地位
n. 楼层
1. The children are playing upstairs.
孩子们正在楼上玩。
2. Please go upstairs and get my book.
请上楼去拿我的书。
3. I heard a noise coming from upstairs.
我听到楼上传来的声音。