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78个百分点

78个百分点

78个百分点

78个百分点

1

Levels of nitrogen dioxide currently exceed the World Health Organization's clean-air guidelines by 78%.

二氧化氮的含量目前已经超出世界卫生组织提出的洁净空气的标准 78 个百分点。

2

Recently , it has fallen to 2 . 78 points, better but still not half way back to average.

最近已跌至 2.78 个百分点，近期尽管有所改观，但减少了还不足一半。

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