我睡在三樓。
I sleep on the third floor
閑置的臥室在三樓。
The spare bedroom is on the second floor
他從三樓的窗戶跳了下來。
He jumped out of a third-storey window.
電梯在一、二、三樓不停。
The elevator doesn't stop at floors 1, 2 and 3.
一位男子在三樓的窗戶朝樓下大聲喊道：“別碰那姑娘！”
From a window on the third floor, a man called down," let that girl alone!"
B在二樓或者三樓。我記不太清楚了，但是你很容易就能找到。
It's on the second or third floor. I can't remember exactly, but you'll find it easily.
這是在walker三樓的體育館。
That is the gymnasium on the third floor of Walker.