The membrane’s protein channels, each just a few nanometers across, allow a stream of water molecules—and only water molecules—to pass single file at a rate of one billion per second.

这种膜上的蛋白通道，直径只有几个纳米，可以（也只可以）让水分子通过，其通道每秒可过滤10亿个水分子。

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Through those tubes, rescue workers could pass food, water, medicine, telephone lines, letters between miners and family members, and games to help pass the time.

通过这两条管道，营救人员能输送食物、水、药品，铺设电话线，传递矿工与家人的信件，还有用来打发时间的游戏。

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This is the tendency for water to pass through a membrane separating a weak solution from a strong one.

渗透是一种水通过膜的运动趋势，膜的两面分别是浓溶液和稀溶液。

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However, even if the regional development minister recommended water charges, Mr Wilson doubted there would be time to pass legislation to introduce household water bills next year.

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They allow their ships to pass in their water, provide them with fuel, food, and supplies and allow their planes to cross their airspace and to even take off from their airports.

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It is believed that WPD plans to keep the SWALEC electricity distribution system and pass on Welsh Water to the English company United Utilities.

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