In all cases, the sow needs to be kept cool and have plenty of water available.

在所有情况下，母猪需要保证凉爽的环境和充足有用的饮水。

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Yet, with the spread of computers, which generate vast amounts of heat and need to be kept cool, tactics for recycling are getting ever more creative.

然而，随着计算机的普及，其产生大量的废热需要冷却，而对这种废热的回收需要更多创意。

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Pieteri Parvinen of Academica explains that data centers do more than just store bits of information. All those machines also give off a lot of heat. They need to be kept cool.

Academica公司的皮埃特里·帕文侬解释道，数据中心的功能不止是储存信息，这些机器运行时散发大量的热量，它们需要降温。

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Vaccines need to be kept cool--between 36 and 46 degrees Fahrenheit--to prevent spoiling.

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Grocers, on the other hand, sell perishable products that have to be kept frozen or cool and that must also be delivered at specific times.

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The water host also means they can be mounted low to the ground, kept cool on hot days, and easily withstand weather events that could topple a tall solar tower.

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