loadspeaker and trumpet 区别

loudspeaker【要用电的】

n. æ‰¬å£°å™¨ï¼›å–‡å­

part of a radio receiving apparatus that changes electric waves into sound-waves loud enough to be heard without ear-phones

trumpet【用吹的方式的乐器】

n. å–‡å­

type of wind musical instrument, made of brass and played by blowing through it