The amount of water used by the community is therefore the figure used by the civil engineer when he is designing the sewage system for its minimum rate of flow.

因此，土木工程师设计污水系统时所用的最小流量就是居民区的用水量。

youdao

With different concentrations of sewage and aluminum sulfate as a mutagen, pea root tip cells in the mitotic index, micro-rate and the rate of chromosomal aberrations are determined.

以不同浓度的污水和硫酸铝作为诱变剂，测定豌豆根尖细胞的有丝分裂指数、微核率和染色体畸变率。

youdao

The intensified first level treatment will enhance the removal rate of the pollutants in urban sewage water.

强化一级处理，可以提高城市污水中污染物的去除率。

youdao

Last year 32m cubic metres of diluted sewage were dumped into the river, at a rate of roughly one discharge a week.

ECONOMIST: The capital's overflowing drains are due for a big upgrade

By 2015, the government intends to add 42 million tons of daily sewage treatment capacity to increase its urban waste water treatment rate to 85 percent.

FORBES: Quenching China's Thirst For Water

Unchecked sewage and filthy water have compounded the cholera problem, and Zimbabwe's death rate from the disease is 10 times greater than rates in areas where treatment is available, Carter said.

CNN: Carter: Cholera-, inflation-ridden Zimbabwe 'a basket case'