She had been sitting with her knitting at her fourth-floor window.
她一直坐在5楼的窗户旁做编织活。
《柯林斯英汉双解大词典》
2
By the fourth TAB of the first window, we noticed the pages were slower to load, and formed something of a queue. The sixth outright crashed.
开到第4个的时候会发现页面加载的速度变慢；开到第6个，该分页就当了。
3
The fourth is used as a stencil for indigo prints, which are used for clothing, quilt covers, door and window curtains, cloth wrappers, aprons and scarfs.