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OUR WORLD

Get some fresh air

作者:21st
Aa
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众多城市持续雾霾的原因是什么?

词数 440 建议阅读时间 7分钟

FEB 20 started as an ordinary school day – only with dark gray air, again. Lingering (逗留不去的) smog blanketed (覆盖) 15 percent of the land in northern and central China and lasted for almost a week.
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