详细解释:n. 主席, 会议主持人, 仲裁人
【计】 筛选人
【化】 慢化剂
【医】 缓和器, 减速器
英语解释：
名词 moderator:
any substance used to slow down neutrons in nuclear reactorsin the Presbyterian church, the officer who presides over a synod or general assemblysomeone who presides over a forum or debatesomeone who mediates disputes and attempts to avoid violence详细解释：
mod.er.a.tor
n.（名词）One that moderates, as:仲裁的人One that arbitrates or mediates.公断人或调解人One who presides over a meeting, forum, or debate.主持人：主持会议，论坛或讨论会的人The officer who presides over a synod or general assembly of the Presbyterian Church.主持官员：主持基督教长老会的会议或大会的官员Physics A substance, such as water or graphite, that is used in a nuclear reactor to decrease the speed of fast neutrons and increase the likelihood of fission.【物理学】 慢化剂：一种物质，如水或石墨在核反应堆中用来减缓中子运动速度和提高裂变可能性的物质