oo一般有两种发音，长音/u:/和短音/u/
长音/u:/有：school, food, zoo, too, soon, moon, afternoon, dining-room, sitting-room,spoon
短音/u/有：look, good, book, cook, foot
像room, classroom, bedroom有两种发音

oo一般有两种发音，长音/u:/和短音/u/
长音/u:/有：school, food, zoo, too, soon, moon, afternoon, dining-room, sitting-room,spoon
短音/u/有：look, good, book, cook, foot
像room, classroom, bedroom有两种发音