| 词汇 | stumble across/on/upon |
| 释义 | Phr V stumble across/on/upon stumbles, stumbling, stumbled stumble across/on/upon sth/sb to discover something by chance, or to meet someone by chanceCustoms officers stumbled across heroin worth $5 million while doing a routine check.Scientists believe they might have stumbled upon a cure for the disease. |
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