While cleaning out the files, I happened upon the original contract from 2015.

整理檔案時，我偶然發現了2015年的原始合約。

We happened on a charming little hotel near the station during our business trip.

出差期間，我們在車站附近偶然發現一間迷人的小旅館。

The recruiter happened upon an excellent candidate's profile while reviewing old applications.

招募人員在翻閱舊的應徵資料時，意外看到一位優秀人選的履歷。