a.

1. 楼下的[B]
   Mary's on the downstairs phone.

   玛丽在楼下打电话。

   Have you checked downstairs yet?

   你查看过楼下吗？

   Are the children downstairs?

   孩子们在楼下吗？

   I'll remodel the downstairs bedroom first.

   我先要装修楼下那间房间。

ad.

1. 在楼下；往楼下
   He fell downstairs and broke his leg.

   他摔下楼折断了腿。

n.

1. 楼下[M]
   The downstairs consisted of three large rooms.

   楼下有三个大房间。

adv.

adj.

n.