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| Chinese | English |
| 化学需氧量 | 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。) |
| 化学计算需氧量 | stoichiometric oxygen required |
| 含氮生化需氧量 | nitrogenous biochemical oxygen demand |
| 生化需氧量 | biochemical oxygen demand The amount of oxygen used for biochemical oxidation by a unit volume of water at a given temperature and for a given time. BOD is an index of the degree of organic pollution in water (在特定温度和给定的时间内，单位体积的水生化氧化的耗氧量。BOD是水体有机污染的程度的指数。) |
| 需耗氧量 | oxygen demand |