Different categories of water need different prices to reflect the different preferences of users.

不同形态的水需要不同的价格来反映不同使用者的需求。

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The proportion of water need to make the dough varies with the nature of the flour but usually it is in the region of 15 gallons per 280 lbs. of flour.

制备面团所需的用水比例跟着面粉的性质而不同,但通常范围是每280磅面粉为15加仑.

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How much water do you need?

你要多少水？

《牛津词典》

They say passengers who sit for hours need to drink plenty of water not liquids that contain alcohol or caffeine.

VOA: special.2009.07.14

You need a functional form that connects the value at one state of matter, the freezing point of water to another phase change, the boiling point of water.

你需要一个函数形式来,连接物质某个态对应的温度值，如水的冰点，和另一个相变,如水的沸点。

麻省理工公开课 - 热力学与动力学课程节选

So inside the cell mostly water, outside the cell mostly water, but I need to separate my water from the water outside.

那么细胞内大多是水,细胞外大多也是水,但我需要将体内的和体外的水隔离开

耶鲁公开课 - 生物医学工程探索课程节选

And water need not be the process's only energy source.

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That's because salt-water mosquitoes need salt water to reproduce.

NPR: Unusual Breed of Mosquitoes Hits Dallas

Scottish Water would need to consult with bodies such as Sepa, the Fisheries Board and possibly Scottish Natural Heritage before any application could be made.

BBC: Drought concern follows Dumfries and Galloway dry spell