r. in a vertical direction
adv. 垂直地
1. The flag was displayed vertically on the wall.
这面旗帜垂直地挂在墙上。
2. Please arrange the books vertically on the shelf.
请把书垂直放在书架上。
3. The elevator moves vertically between the floors.
电梯在楼层之间垂直移动。