值得积累的表达已经用红色字迹标出来啦~
文中有两处翻译值得学习，一为“肇因”的处理；二为“是”的选词
MessageontheInternationalDayofCleanAirforBlueSkies国际清洁空气蓝天日致辞7September年9月7日Aroundtheworld,nineoutofeverytenpeoplebreatheuncleanair.Airpollutioncontributestoheartdisease,strokes,lungcancerandotherrespiratorydiseases.Itcausesanestimated7millionprematuredeathseveryyear,predominantlyinlow-andmiddle-in