tumble upon

• v. 偶遇

tumble upon的用法和样例：

例句

用作动词 (v.)

1. I chanced upon an old schoolmate in the street yesterday.
   昨天我在大街上偶遇了我的老同学。
2. Jessica came upon some old letters when she was cleaning the room.
   杰西卡在清洁房间的时候偶遇了一些旧信件。