其他投入或鱼的密度也要小心严格的限制，以避免破坏水质或者污染环境。
Other inputs and fish density are also carefully limited to avoid compromising water quality or degrading the environment.
在你将一张张大网撒青蛙时，可想过庄稼大声的抗议？大自然已经敲响的警钟，告诉我们：别再污染环境了，毕竟，环境破坏，我们人类也将付出挽回的惨重的代价。
Nature has already sounded the alarm, telling us: stop polluting the environment, and after all, environmental damage, we humans also have to pay a heavy price for turning back.
盐污染环境中由于氯化物引起钢筋腐蚀导致钢筋混凝土结构过早破坏，是世界上普遍存在的现象。
It is the phenomenon that concrete structures in salted contaminated environments suffer premature deterioration from chloride induced reinforcing corrosion.
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