Whataretheadvantagesofhavingacar?InChina,over104,,whichaffectspeople’,speedlimitidenttrafficjamcarbonmonoxideairpollutionpavementcrossroadsconstructionworks道路施工speedlimit限制速度KeyWordsinTheText道路施工速度限制交通事故交通堵塞一氧化碳空气污染人行道十字路口constructionworksspeedlimitidenttrafficjamcarbonmonoxideairpollutionpavementcrossroads
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