常见例句

双语例句

COD; chemical oxygen demand;
化学需氧量；
The COD(Chemical Oxygen Demand) standasrd method costs long time, heavy operation to get result.
《水和废水监测分析方法》化学需氧量测定方法时间长，操作繁琐。
After 30 days' continuous running, the COD(Chemical Oxygen Demand) removal rate was improved to 82% and BOD(Biochemical Oxygen Demand) removal rate reached to 92%.
污水处理系统运行到30 d左右时，化学需氧量（COD）的去除率达到82%，生化需氧量（BOD）的去除率达到92%。