hap·pen

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【词性】：vi．

【释义】：

❶ (事故等)发生：What has happened?发生了什么事?How did the accident happen?这个事故怎样发生的?❷ 碰巧：It happened to be the first of May．那天刚好是五月一日．I happened to meet him in the street我偶然在街上碰见他．happen on(or upon)偶然看到(碰到、想到)：I happened on just the thing I’d been looking for我偶然发现了我一直在找的东西．ns it happens恰巧：As it happens，I’ve left the book at home．不凑巧，我把那本书放在家了．