first floor,teachers office

first floor library second floor teachers' office
second floor second 第二 first floor first 第一
first floor,是"一楼"还是"二楼"?
c b r speak out the sounds, you can get on the first floor
firstfloor原创小众设计师泡泡袖甜酷暗黑不规则机能少女夏连衣裙