动词短语
中文翻译：偶然发生
同义词：
['happen', 'come across', 'chance upon例句：1. I happened upon abookstore on my way home from work.（我在下班回家的路上偶然发现了一家书店。）']
例句：
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1. I happened upon abookstore on my way home from work.
我在下班回家的路上偶然发现了一家书店。
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2.She happened upon a friend at the parkand decided to catch up.
她在公园里偶然遇到了一个朋友，决定去打个招呼。
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3.He happened upon a new restaurant in townthat he had never heard of before.
他在镇上偶然发现了一家他以前从未听说过的新餐厅。