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 letters page of this newspaper is a forum for public argument.
这份报纸的读者来信栏是公众意见的论坛。
The letters page serves as a useful forum for the exchange of readers' views.
读者来信版是读者们交换意见的有益园地。