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室内会议分为演讲式和讨论式。前者是在主席台上放回个或几个传声器，由操作人员根据会议规定来控制传声器的接通／断开，其扩音系统扬声器采取集中式或分散式。会议讨论式是供主席（主持人）和代表以分散自动方式或者由操作人员集中手动方式，使他们的传声器接通／断开，在其
Indoor conferences are divided into lecture styles and discussion styles. The former is to put back one or more microphones on the rostrum. The operator controls the on/off of the microphones according to the conference regulations. The loudspeakers of the loudspeaker system are centralized or decentralized. The conference discussion is for the chairman (host) and the delegate to make their microphones on/off in a decentralized automatic manner or manually by the operator.