There is water too dirty or water quality change bad, need to replace clean water.
还有就是冷却水太脏或水质变坏，需要更换干净的冷却水。
The current situation evaluation is to contrast the current water quality with the water quality standard, the dynamic evaluation can reflect the trend of water quality change.
现状评价是对比现状水质与标准之间的关系，而动态评价可反映水质变化的趋势。
To evaluate underground water quality and analyze water quality change trend offered dependable basis for underground water utilization and protection water resources in the area.
评价了地下水水质功能，并分析了水质变化趋势，为该地区开发利用地下水，保护水资源提供了可靠依据。
Other environmental pressures to the reef and its ecosystem include water quality from runoff, climate change accompanied by mass coral bleaching, and cyclic outbreaks of the crown-of-thorns starfish.
其他对于大堡礁及其生态系统的环境压力来自径流的水质问题，伴随着大规模珊瑚白化的气候变化以及棘冠海星的周期性爆发现象。
The hydrology is a science to study natural water movement, the change state and rule of the water quantity and quality in time and space.
水文是研究自然界水的运动、水的数量和质量在时间和空间上变化状况及变化规律的一门学科。
Among the ranges, the near infrared region is commonly used to assess the change of vegetation cover and water quality.
在不同的电磁光谱范围中，近红外线通常是用作分析植被分布及检测水体素质。
Water quality of ground water in Luohe formation and Huanhe formation of Cretaceous system of Binchang mining area have clear change law along horizontal and vertical directions.
彬长矿区白垩系洛河组、环河组地下水水质在横向上和纵向上的都具有明显的变化规律。
Two trials were carried out to study the water activity adsorption isotherms and laws in quality change of four moulding feedstuffs.
试验分为水活性等温吸附曲线研究和霉变后品质变化规律研究两个部分。
The reason may be that PSB change the water quality well and increase the plankton which provided the fish good environment and enough food.
这是因为PSB改善了水环境，并且促进了浮游生物的增长，从而使鲢、鳙鱼获得更好的生长环境与充足的饵料。
The quantity, quality status, and temporal and spatial change of water resources of Haihe river basin are analyzed.
分析了淮河流域水资源的数量和质量现状及其时空变化特征。
This paper analyzed the running effectiveness of a baffle acidification tank for treating the antibiotic wastewater, as well as the effect of a change in water quality on the acidification.
分析了折流式酸化池在抗生素废水处理工程中的运行效果和水质变化对酸化作用的影响。
The water quality and sludge of Nujiang river in Baoshan region are assessed based on monitoring data. The change trend of the water quality is analyzed qualitatively.
根据监测资料，对保山境内怒江流域水质及底泥现状进行了评价，对水质变化趋势进行了定性分析。
Objective to understand the change of barreled pure water hygiene quality in urban area of Wuhu and probe into the scientific method of supervising management of the pure water hygiene.
目的了解芜湖市市区桶装纯净水卫生质量变化情况，探讨纯净水卫生监管的科学方法。
Change water25% at least every month to keep the water at high quality.
每月至少换水25%，以维持高品质的水质。
This paper mainly analyses environmental geological problems such as descend funnel land subsidence. Water quality deterioration produced by groundwater level change.
本文主要分析了地下水水位变化引起的降落漏斗及地面沉降、水质恶化等环境地质问题。
The change law, pollution characteristics and causes of formation are discussed on the basis of synthetic evaluation of water quality situation over the years in Yining city section.
在对伊犁河伊宁市段历年水质状况进行综合评价的基础上，探讨了城市河段水质的变化规律、污染特征和成因。
In the end, the basic change of the water quality is deserved. On the basis of those, the eutrophication waters can be repaired by precipitum and nitrobacteria.
在了解水体水质变化状况的基础上，利用消氮细菌及沉淀细菌对实验水体进行生物修复。
Based on the water quality and requirement, the pretreatment process and operation parameter are designed, and the change rules of fouling-resistant reverse osmosis membranes is identified.
针对回用污水的水质和处理要求，设计预处理工艺和运行参数，并对抗污染反渗透膜组件性能的变化规律进行研究。
The characteristic of small hospital sewage is complex quality, small water volume and large change in scope.
小型医院废水具有水质复杂，水量小且变化幅度大等特点，在污水处理工程中有一定的典型意义。
It's important for the municipal sewage reusing to grasp the change of the water quality in the course of the municipal sewage reusing as circulating cooling water.
掌握城市污水在回用于循环冷却水过程中水质的变化规律对于城市污水回用意义重大。
Arises the crowd mainly with the diet related, the improvement water quality and the change diet custom is pre - vents the stone the essential method.
发病人群主要与饮食有关，改善水质和改变饮食习惯是预防结石的必要手段。
It requires change with changes in feed water quality conditions, the decolorization effect of hydrophilic poor, COD removal rate.
缺点是需随着水质变化改变投料条件，对亲水性染料的脱色效果差，cod去除率低。
As an important aspect of hydrological processes, water-level change can directly or indirectly affect the quality and quantity of nitrogen in various forms.
水位变化作为水文机制的重要方面，直接或间接的影响人工湿地环境各种形态氮质和量的变化。
The change of water temperature could take series of impact on water quality, growth of Marine organisms and production of industry and agriculture in reservoir region and its lower rivers.
水库水温的变化会给水库库区及其下游河道的水质、水生生物的生长及工农业生产带来一系列的影响。
Therefore, the thorough research on the change of groundwater water quality and the interface of salt and fresh is urgently needed at present.
因此，地下水水质及咸淡水界面变化是目前急需深入研究的问题。
White powder, effective hard-water complex metal ions such as calcium and magnesium, lower hardness and change the water quality to make it more conducive to washing operation.
白色粉末，有效络合硬水中的钙镁等金属离子，降低硬度，改变水质，使其更利于洗涤操作。
White powder, effective hard-water complex metal ions such as calcium and magnesium, lower hardness and change the water quality to make it more conducive to washing operation.
白色粉末，有效络合硬水中的钙镁等金属离子，降低硬度，改变水质，使其更利于洗涤操作。
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