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| chemical oxygen demand The quantity of oxygen used in biological and non-biological oxidation of materials in water; a measure of water quality (水中生物或非生物氧化作用中消耗氧的量，是对水体质量的一种评估。) | |||
| chemical oxygen demand | |||
| chemical oxygen consumption; Crack Opening Distance | |||
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| chemical oxygen demand | |||
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| chemical oxygen demand | |||
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化学需氧量 : 37 phrases in 8 subjects |
| Desert science | 1 |
| Earth sciences | 5 |
| Ecology | 1 |
| Environment | 1 |
| General | 2 |
| Oil / petroleum | 1 |
| Technology | 19 |
| Water resources | 7 |
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