to happen on
[phrase form: happen]
01
偶然发现, 碰巧遇到
to find or encounter something without actively searching for it
例子
He happened upon a rare coin while metal detecting on the beach.
他在海滩上用金属探测器时偶然发现了一枚稀有硬币。
We happened upon an amazing street market during our vacation.
我们在度假时偶然发现了一个很棒的街头市场。
