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占统计

占统计

占统计

占统计

1

The cities where the annual concentration of SO2 did not attain national Grade II standards account for 19 . 4% of the cities for statistics.

二氧化硫年均浓度未达到国家二级标准的城市占统计城市的 19 .

2

The air quality in 113 was worse than Grade III , accounting for 33 . 2%.

113 个城市空气质量劣于三级，占统计城市数的 33 .

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