stereo          
noun uk/ˈster.i.əʊ/ us/ˈster.i.oʊ/
 [ U ]立体声 
a way of recording or playing sound so that it is separated into two signals and produces more natural sound
  The concert will be broadcast in stereo. 音乐会将用立体声播放。 
  [ C ]体声音响,立体声唱机 
a piece of electrical equipment for playing music, listening to the radio, etc. that sounds very natural because the sounds come out of two speakers (= parts for playing sound)
  Loud music was coming from the car stereo.