It's on the first floor.

它在一楼。

On the first floor, we have science and computer labs.

一楼有科学和计算机实验室。

When I was looking for the exit, I saw that shoes were actually sold downstairs on the ground floor, not the first floor.

当我找出口时，我看到鞋子实际上是在底楼卖的，而不是在一楼。

Our office is on the first floor.

我们的办公室在一楼。

We live on the first floor of the apartment.

我们住在公寓的一层。

Rooms on the first floor are usually cheaper.

一楼的房间通常比较便宜。

The company's switchboard is on the first floor.

公司总机在一楼。

They opened a new restaurant on the first floor.

他们在一楼开了一家新餐馆。

We found a good parking spot on the first floor.

我们在一楼找到了一个好停车位。

The landlady lives on the first floor of the building.

女房东住在这栋楼的一楼。