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(hù)跳了下來(lái)。

　　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(hù)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.