happen upon
偶然碰到(偶然发现)
例句与用法:
At the meeting I happened upon an old friend I had not seen for years.
在会议上我遇见了一位多年不见的老朋友。
词形变化:
动词过去式: happened | 动词过去分词: happened | 动词现在分词: happening | 动词第三人称单数: happens |