Our water supply is becoming polluted with nitrates.

我们水源正受硝酸盐污染。

No combined exploitation of paretic water and artesian water already polluted may be permitted.

对已受污染潜水和承压水，不得混合开采。

The once clear mountain stream is now polluted and opaque.

曾经是很清澈山溪, 现在受污染变得混浊了。

The factory has dumpaged its castoff into that river all along.As result,the river has been polluted.

该工厂一直将其废弃物倾倒在那条河里。结果，那条河被污染了。

Polluted air hangs over the city.

城市上被污染所笼罩。

Is the water polluted at source?

河水是在源头受污染吗?

The worst sufferers of the condition tend to live in highly polluted areas.

病情最严重都居住在重度污染区。

Try to procure us some specimens of the polluted water from the river.

请设法给我们从河里搞一些被污染了河水标本来。

The polluted air in the city is badly endangering the health of the residents.

城里被污染正严重地危及居民健康。

Polluted water contains contaminants.

被污染水中含有放射性污染。

Parents are afraid that their children's minds will be polluted with the violence that they see on television.

父母担心电视上暴力行为会对孩子产生精神上污染。

In this paper,we study the permanence of populations of a competing chemostat model in a polluted environment.Population control is also dealt with for the model without inter species competitionin.

讨论了污染竞争恒化器模型永久持续生存性,当种群只有种内竞争时考虑了种群控制问题。

Abstract The climate of southern area is muggy and wet.It is apt to multiply chironomid larva, which is the polluted insect in the system of supplying water of the city.

摘 要 南方地区候适宜摇蚊幼虫孳生，其繁殖迅速，环境耐受力较强，经常污染城市供水系统，且很难通过与氯接触被灭活。

Afterwards " fuliginous model " , " photochemical smog " after pollution, modern is being entered with " indoor air is polluted " the 3rd generation that is a mark pollutes period.

继“煤烟型”、“光化学烟雾型”污染后，现代人正进入以“室内污染”为标志第三代污染时期。