first floor 英[fə:st flɔ:] 美[fɚst flɔr]
n. 第一层;
[例句]For your information, the library is on the first floor.
谨奉告，图书馆在二楼。
[其他] 复数：first floors
second floor 英[ˈsekənd flɔ:] 美[ˈsɛkənd flɔr]
n. <美>二楼，<英>三楼;
[例句]She repainted the downstairs rooms and closed off the second floor.
她重新粉刷了楼下的房间，并把二楼封上了。
