在三楼;在四楼;在三楼上
From the little window on the third floor, the head of the dead man gazed down upon them.
在四楼的窗口,只有死人的头在望着他们。
来源:互联网摘选From a window on the third floor, a man called down," let that girl alone!"
一位男子在三楼的窗户朝楼下大声喊道:“别碰那姑娘!”
来源:词典精选例句Crack Analysis and Reinforcement of the Girder on the Third Floor of a Complex Building
某综合楼三层主梁裂缝分析与加固处理
来源:互联网摘选