stumble across
柯林斯词典
1. PHRASAL VERB If you stumble across something or stumble on it, you find it or discover it unexpectedly. 意外发现
I stumbled across an extremely simple but very exact method for understanding where my money went. 我意外发现了一种极其简单但又非常准确地知道我的钱去向何处的方法。
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