The objective is to study the impact of extra water on the immune system in mice.

目的是研究多余的水对老鼠免疫系统的影响。

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Between thirty and thirty-five women used each system to pump water from the ground or a stream.

VOA: special.2010.01.11

So a closed system would be, for instance, a glass of ice water with an ice cube in it, with the lid on top.

因此闭系可以是，比如说，一杯放了,一个冰块的冰水，顶上加了盖子。

麻省理工公开课 - 热力学与动力学课程节选

The renal system has an equally important function in that way, in maintaining your water balance.

泌尿系统也同样十分重要,它能够维持体内的水平衡

耶鲁公开课 - 生物医学工程探索课程节选

The closure is being implemented to allow a disinfection of the water system and a major refurbishment of the heating and water system.

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The water system provides drinking water for 42 million people and is a defining characteristic of the states and provinces along its borders.

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The 59-acre (24 hectare) site will also boast a solar thermal hot water system to pre-heat the water for the heating system, and a biomass boiler that will provide heat using locally-sourced wood chips.

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