statutory air quality objectives 空气质素的法定指标
statement of air quality objectives 空气质素指标声明
air quality objectives
空气质素指标
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The town's Exeter Road and High Street were both found to have unacceptably high levels of two pollutants and national air quality objectives are unlikely to be met.
BBC: NEWS | UK | England | Devon | Town's air quality causes concern
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