They have a supply of water that is clean, predictably delivered and reasonably secure.

他们的水供给水质洁净、送达准时、相当安全。

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But they spent a lot of time, energy, and money on being sure that they would have a supply of water to hold them for a long siege.

他们花费了大量的时间，精力，和金钱来确保，在长期的围城中他们可以获得足够的水源。

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Singaporeans still import 40% of their needs. Even so, they have a supply of water that is clean, predictably delivered and reasonably secure.

新加坡水资源的进口仍占40%，但尽管如此，其水资源的供给却可以保障清洁、顺畅、准确无误。

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Experts say even a two percent drop in the body's water supply can cause signs of dehydration.

VOA: special.2010.07.27

But they spent a lot of time, energy, and money on being sure that they would have a supply of water to hold them for a long siege.

他们花费了大量的时间,精力,和金钱来确保,在长期的围城中他们可以获得足够的水源

耶鲁公开课 - 古希腊历史简介课程节选

Separating our water supply from sewage and learning how to do wastewater treatment was a really important part of reducing infectious diseases.

把净水和污水分开,以及学会污水处理的方法,是减少感染性疾病传播方法中的重要部分

耶鲁公开课 - 生物医学工程探索课程节选

Ensure a supply of water for sanitary purpose such as cleaning and flushing toilets.

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The creatures have engineered the rings to maintain a supply of water in their environment, he tells Science magazine.

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There are safety measures you can take, by preparing your house with a supply of water or food, as though you were preparing for a winter storm.

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