1. I stumbled across some old photographs while cleaning the attic.
我在清理阁楼时偶然发现了一些旧照片。

2. They stumbled across a charming little cafe in a side street.
他们在一条小巷里偶然发现了一家迷人的小咖啡馆。

3. Scientists stumbled across a new species of insect during the expedition.
科学家们在考察过程中偶然发现了一种新的昆虫物种。

A: What did you find in the old library?
A：你在旧图书馆里发现了什么？

B: I stumbled across a rare first edition of a famous novel.
B：我偶然发现了一本著名小说的稀有第一版。

1) 偶然发现

2) 撞见

3) 无意间遇到

1. 偶然发现

e.g. She stumbled across an interesting article online.
她在网上偶然读到一篇有趣的文章。

phrase

1. To find or meet someone or something by chance.

Synonym: come across, stumble upon