n. a vertical structural member as a post or stake
n. a piano with a vertical sounding board
s. in a vertical position; not sloping
a. 正直的, 诚实的, 公正的, 垂直的, 竖式的
[化] 立杆
1. The chair is designed to be upright for better posture.
这把椅子的设计是直立的,以保持更好的姿势。
2. He stood upright and looked around the room.
他直立着站着,环顾四周。
3. Make sure to keep your back upright while driving.
驾驶时确保保持背部直立。