- 問題詳情:Avuvuzelaisahorn,aboutameterlong,usuallymadeofacolourfulcheapplastic.________Whenit'sblownbythousandsofsupportersatthesametime,it'sloud,veryloud.Itsoundsabitlikeanairhornandyoucanhearitalotduringthe2010WorldCup. Thevuvuzelawasoriginallymadefro...
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