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| 环境空气质量标准 | |||
| 周围空气质量标准 | |||
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| 环境空气质量标准 | |||
| English thesaurus | |||
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| AAQS (Maximum permissible concentration of a specific pollutant in the air allowed by the federal government.) | |||
| ambient air quality standard: 10 phrases in 8 subjects |
| Automobiles | 1 |
| Earth sciences | 1 |
| Ecology | 3 |
| Environment | 1 |
| Refrigeration | 1 |
| Space | 1 |
| Technology | 1 |
| Wind Energy | 1 |