David was one of the most helpful students that we ever had.的翻译：David was one of the most helpful students that we ever had. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

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David was one of the most helpful students that we ever had.

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David was one of the most helpful students that we ever had.

David was one of the most helpful students that we ever had.

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