stumble on
柯林斯词典
1. PHRASAL VERB If you stumble across something or stumble on it, you find it or discover it unexpectedly. 意外發現
I stumbled across an extremely simple but very exact method for understanding where my money went. 我意外發現了一種極其簡單但又非常準確地知道我的錢去曏何処的方法。
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