The methods of raising water quality index, ensuring the water pressure and controlling water temperature are put forward.

提出了提高水源水质指标，保障供水压力，控制供水温度的具体方法。

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Compared with sulfuric acid process, under the premise of ensuring pure benzene quality, the pollution of tar acid and waste water contained with acid on environment can be eliminated.

与硫酸法相比，在保证纯苯质量的前提下，可消除酸焦油和含酸废水对环境的污染。

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While much bottled water is of good quality, there are little or no regulations or means of ensuring bottled water quality it is a self-policed industry for the most part.

虽然很多樽装水的品质是好的，但保证其品质的规范或方法却是几乎没有…基本上这是一个自我监督的行业。

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"This is a superb result and emphasises the importance that the council has placed on ensuring that our beaches are clean, the water quality is as high as it can be and that our internationally recognised coastline offers top quality facilities for both residents and visitors, " he said.

BBC: The Blue Flag awards highlight the best and safest beaches