他去年参加了一个环境会议。

He took part in an environmental conference last year.

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He took part in an environmental conference last year.

conference 是名词,来自动词 confer(商讨、商议),意思是"会议、讨论会",通常指正式的、有组织的会议活动,参与者会就特定议题进行讨论和交流。

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