![Stopandlisten!Whatdoyouhear?Youmayhearmanydifferentsoun...]( "Stopandlisten!Whatdoyouhear?Youmayhearmanydifferentsoun...")
- 问题详情：Stopandlisten!Whatdoyouhear?Youmayhearmanydifferentsounds.Someofthosesoundsmaybenoise.Noiseisaloudorunwantedsound.Manykindsofmachines,suchasmotorcycles,jetplanes(喷气式飞机),farmtractorscancausenoise,andpowermotorscancausenoise.And,tosomepeop...
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