动词
中文翻译：发生
同义词：
['occur', 'take place', 'occur']
例句：
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1. It happened that the meetingwas canceled due to bad weather.
由于天气不好，会议被取消了。
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2. The accidenthappened at 7 o'clock inthe morning.
事故发生在早上7点。
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3. Hehappened to be there when the fire brokeout.
火灾爆发时，他恰巧在那里。