The deterioration of water quality is a common but troublesome problem in turtle cultivation.
温室有砂育鳖的水质恶化是育鳖中经常遇到的棘手问题。
Diffuse pollution is one of the important sources that cause the deterioration of water quality in city.
城市面源污染是我国水环境质量恶化的重要原因之一。
The ageing of water supply pipe may lead to decrease of water conveyance capacity, higher fault rate and deterioration of water quality.
金属给水管道老化会使管道的输水能力降低、故障率增高和水质变坏。
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