In addition to supplying essential nutrients, partial change of water can dilute and remove harmful waste product that accumulates in closed environments.
除供应根本营养素之外，水的部份变动可能稀释和去除在闭合的环境里积累的有害的废品。
During offshore drilling operation, a lot of wastes are produced, such as polluted water, gas, solid waste and harmful noise, which damage to the environment around the drilling operation area.
在海上钻井的生产过程中会产生大量的固体废弃物、废水、废气及噪声污染，将对作业海域造成一定的危害。
The constituents of charring waste water are very complicated, which is greatly harmful to the environment and is difficult to deal with.
焦化废水成分复杂、多变，对环境有较大危害，是一种很难处理的工业废水，已经引起了国内外学者广泛关注。
The paper relates the pollution and harm from the drained off waste acid from wire drawing and cooling water with harmful impurity in steel wire production.
叙述拉丝生产中排放的废酸和含有害杂质的冷却水对周围水质的污染及危害。
Ideally, it's a place where the air quality is good, the water is safe to drink, and factories aren't dumping harmful chemical waste into the environment.
理想的情况下，那就是空气质量好，饮用水没有污染，工厂不向空气排放废弃物的地方。
Through the vadose zone can effectively remove the harmful substances in waste water and prevent groundwater pollution.
污水经过包气带，能有效地去除污水中的有害物质，防止地下水污染。
Through the vadose zone can effectively remove the harmful substances in waste water and prevent groundwater pollution.
污水经过包气带，能有效地去除污水中的有害物质，防止地下水污染。
应用推荐