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| photochemical air pollution | |||
| photochemical pollution Air pollution containing ozone and other reactive chemical compounds formed by the action of sunlight on nitrogen oxides and hydrocarbons, especially those in automobile exhaust (一种大气污染，使空气中的臭氧和其它化合物发生作用而形成的氮氧化物和碳氢化合物，尤其是在汽车尾气中。) | |||
| spectrochemical pollution | |||
| photochemical pollution | |||
| 光化学污染: 5 phrases in 2 subjects |
| Metallurgy | 2 |
| Technology | 3 |
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