Definition
to encounter someone or discover something by chance
无意中发现；碰见；邂逅
I came upon a hidden garden while taking a walk.
我散步时无意中发现了一个隐秘的花园。
She came upon an old friend at the bookstore.
她在书店里偶然遇到了一位老朋友。
We came upon a breathtaking mountain view during our trip.
在旅途中，我们偶然看到了一处令人惊叹的山景。