| 词汇 | stumble on/across sb/sth |
| 释义 | stumble on/across sb/sth phr v to find something or someone that you did not expect to find 偶然发现，偶然碰到: Clearing out a cupboard that evening, she stumbled across one of her old diaries. 那晚她在清理柜子的时候，偶然发现了她一本旧日记。 |
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