stumble ·phrasal verb
Definition: to discover something by chance, or to meet someone by chance Level: C2
我在清理书桌时偶然发现了这些照片。
I ___stumble ___across these photographs while I was cleaning out my desk.
在浏览房产网站和周末看房数月之后，我们终于偶然发现了拉文德路上这栋惊艳的端户联排别墅。
After months of browsing property websites and going house-hunting on weekends, we finally ___stumbled ___upon this amazing end-of-terrace house on Lavender Road.
在为我的论文研究时，我在图书馆档案中偶然发现了一份罕见的手稿。
While researching for my thesis, I ___stumble ___on a rare manuscript in the library archives.