四楼的英文：
third floor

参考例句：

Passing of the Third Floor Back
四楼尽头的信道

The meeting room is in the third floor, sorry, the fourth floor.
会议室在三楼，抱歉，是四楼。

There are some vacant offices on the third floor.
四楼有几间空着的办公室。

third是什么意思：
num. 第三，三分之一
adj. 第三的；三分之一的

One third of the population are townsmen and two thirds countrymen.
三分之一的人口是住在城里，三分之二住在乡下。

Passing of the Third Floor Back
四楼尽头的信道

The third coordinate is elevation.
第三项坐标是高程。

Will Spurs be relegated to the third division?
斯珀尔斯队会降为丙级队吗?

Third, have faith in your job.
第三，要对你的工作有信心。

floor是什么意思：
n. 地板，地面；基底；议员席；楼层
v. 铺地板；打倒；难倒

floor of the House
英国议会中议员的座席|议员席

floor criterion
最低额标准

The meeting room is in the third floor, sorry, the fourth floor.
会议室在三楼，抱歉，是四楼。

Lay the floor with a carpet. [Lay a carpet on the floor.]
把地毯铺在地板上。

Strew papers over the floor/strew the floor with papers
把文件扔得满地都是.