second floor的意思是什么

　　例句：

　　There are three bedrooms and a bathroom on the second floor.

　　二樓有三個(gè)臥室和一個(gè)浴室。

　　Main functional rooms of the second floor include dormitory, canteen and office etc.

　　二層主要功能房間包括宿舍、餐廳和辦公室等。

　　The spare bedroom is on the second floor

　　閑置的臥室在三樓。