speaker
名词 speaker:
someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)
同义词:talker, utterer, verbalizer, verbaliser
electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance
同义词:loudspeaker, speaker unit, loudspeaker system, speaker system
the presiding officer of a deliberative assembly