moderator

n 1 person who arbitrates in a dispute; mediator 仲裁人; 调解人. 2 person who makes sure that the same standards areused by different examiners when marking an examination 评分监督（统一各主考人评分标准者）. 3 Presbyterian minister presiding over a church court 长老会教会法庭上的主持者. 4 (physics 物) substance in which neutrons are slowed down in a nuclear reactor 减速剂, 慢化剂（核反应堆中使中子减速的物质）.

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