1. 名詞
   不可數名詞: 發生
   出現
   可數名詞/
   複數為"occurrences":
   事件, 事變
   發生的事
   a common occurrence/
   common occurrences:
   常事
   (指事)家常便飯
   

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   同義字詞
   affair,circumstance,episode,event,happening,incident,occasion,thing
   

例句

1. It is simply an unexpected occurrence .
2. As well, greed is a common occurrence .
3. Is scrape visitation a random occurrence ?
4. This seems like a freak occurrence but its not.
5. Such changes should not be a common occurrence .
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