一楼：ground floor [graʊnd flɔː] ; firs floor [fɜːst flɔː]
二楼：second floor ['sek(ə)nd flɔː]
例句：
1、我之前已经提到过这个，它就像是楼房的一楼。
I already mentioned that. It's like the ground floor.
2、当我们向家进发的时候，我转过头看着校舍，唯一看见的就是站在一楼窗口的那个士兵，目送着我的离去。
As we were marching home, I turned to look at the schoolhouse. And who should I see, but my soldier in the first floor window.
3、地震发生时，周围的墙和天花板开始破碎。 而此时，朱利安·瑟德森正在他的公寓内，一座老旧的砖砌电影院一楼。
Julian Sanderson was in his apartment on the first floor of an old brick movie theater when thewalls and ceiling began to crumble around him.
