他谈论环保问题时表现出的真挚让听众深受感动。

His earnestness when discussing environmental issues deeply moved the audience.

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His earnestness when discussing environmental issues deeply moved the audience.

earnestness 是由形容词 earnest(真诚的、认真的)加上名词后缀 -ness 构成的名词,表示"真诚、认真"的状态或品质。

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