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英语翻译英语翻译下面三句话,1,much of the public attention to air pollutio

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英语翻译
英语翻译下面三句话,
1,much of the public attention to air pollution has been focused on episodes in which deaths occurred during periods of pollution and were clearly caused by its toxic effects,
2.Many illnesses have been examined,but the ones that have prompted more research than any others have been diseases of the respiratory tract-lung cancer,chronic bronchitis,and emphysema.
3.One wonders how mary people have died(or killed others)on crowded highways from heart attacks triggered by dirty air.
1.公众对空气污染的关注绝大多数是集中在那些在污染期间发生死亡,或者确定是因为其毒性作用造成死亡的事件.
2.许多疾病都被检查出来,但是引发更多研究的,主要是那些呼吸道,肺癌,慢性支气管炎和肺气肿之类的疾病.
3.人们想知道有多少人死于(或者造成他人死于)在拥挤的高速公路上由于不洁空气而引起的心脏病发作.