- 問題詳情:Whenhewasnineyearsold,AmericanboyMiloCresshadaquestion:Howmanyplasticstraws(吸管)doAmericansuseeveryday?Hequicklylearnedtherewasn’tasimpleanswer.Theboytriedtoworkitouthimself.Throughlotsofresearch,CressfoundoutthatAmericansuseabout500million...
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