Biochemical oxygen demand - BOD: a measure of the amount of pollution by organic substances in water.

生化物需氧量(简写为BOD)：一种衡量有机物在水中的污染量的标准。

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They are commonly measured in units of biochemical oxygen demand (BOD), or the amount of oxygen needed to decompose them.

常常使用生化需氧量，即有机物分解所需的氧这个单位进行测量。

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Biochemical oxygen demand, BOD is necessary for water quality evaluation. It is an important index in measuring organic materials pollution.

生物化学需氧量bod是水质评价的必测项目，是衡量有机物对水质污染的重要质量指标。

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