loadspeaker and trumpet 区别
loudspeakerãè¦ç¨çµçã
n. æ¬å£°å¨ï¼åå
part of a radio receiving apparatus that changes electric waves into sound-waves loud enough to be heard without ear-phones
trumpetãç¨å¹çæ¹å¼çä¹å¨ã
n. åå
type of wind musical instrument, made of brass and played by blowing through it
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