它在一楼。

It's on 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。

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

我们的办公室在一楼。

Our office is on the first floor.

他们在一楼开了一家新餐馆。

They opened a new restaurant on the first floor.

我们在一楼找到了一个好停车位。

We found a good parking spot on the first floor.

公司总机在一楼。

The company's switchboard is on the first floor.

地下室在一楼下面。

The basement is below the ground floor.

她在一楼工作。

She works on the first floor.

我的卧室在一楼。

My bedroom is on the first floor.

我的办公室在一楼。

My office is on the ground floor.