它在三楼。

It's on the third floor.

我们的办公室在三楼。

Our office is on the third floor.

放射学的科室在三楼。

The radiological department is on the third floor.

她爬楼梯到达她在三楼的公寓。

She climbs the stairs to reach her apartment on the third floor.

会议室在三楼。

The meeting room is on the third floor.

儿科部门在三楼。

The Pedi department is on the third floor.

账单部门在三楼。

The billing department is on the third floor.

化学实验室在三楼。

The chem lab is on the third floor.

图书馆在三楼，大楼的最东面。

The library is on the third floor, at the east endof the building.

在三楼或者四楼.

On the third or fourth floor.