1
- down a flight of stairs顺楼梯而下：
I tripped over the cat and fell downstairs.
我因为被猫绊了一下而摔下了楼梯。
1.1
- on or to a lower floor在楼下; 往楼下：
we were waiting for you downstairs
我们在楼下等你
she called him downstairs.
她把他叫下楼。
- the ground floor or lower floors of a building底楼, 下面的几层楼：
the downstairs was hardly damaged at all.
楼下几乎没受到什么损坏。