聽力每日練習(xí) listen 2741 Air?pollution

 
2--Yes, it's one of the main air pollutants. Factories don't emit it directly into the air.
It's actually formed when nitrogen oxides and VOC emissions come into contact with heat and sunlight.
 
1-- Sorry? What does VOC stand for?
 
2-- Oh, VOCs are 'volatile organic compounds'. That's a technical term for solvents or other chemicals found in things like paint.
 
1-- So, what damage does ozone do to the environment?
 
2-- Well, it can cause smog, which can affect people's health - especially people with breathing difficulties.
 
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注解：
 
1.exactly究竟  
2.air pollutants空氣污染物
3.environment環(huán)境
 
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譯文：
 
1--我聽說近地面臭氧，但是你能確切解釋一下是什么嗎？
2--是，它一個(gè)主要的空氣污染物。工廠不把它直接排到大氣中。
它實(shí)際會(huì)形成一氧化氮，而且它在與光和熱的接觸下會(huì)釋放出VOC。
1--對不起？VOC代表什么？
2--哦,VOCs是揮發(fā)性有機(jī)混合物。這是溶劑方面的一個(gè)專業(yè)術(shù)語，其它的化工品像油漆等也有這種物質(zhì)。
1--那么,臭氧對環(huán)境有什么破壞？
2--哦，臭氧會(huì)引起濃霧,影響人們健康，特別是會(huì)讓人感到呼吸困難。