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At low temperatures, the nonfreezing fluid protects the solar collectors and related piping from bursting.

,不冻结气体保护太阳收集器和相关管道以

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at the front of, at the head of, at the instance of, at the last moment, at the latest, at the least, at the mercy of, at the moment, at the most, at the opposite extreme,

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3G, 401(K), a,

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The family uses a solar energy collector for electricity.

使用收集器发电。

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双语版 TED-Ed 演讲精选

These are the first of several planned amphibious structures, some of which house water purification systems and solar collectors.

些是早规划中的水陆两用建筑,其中一些安装了净水系统收集器

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小学版9月

But it takes a lot of money to set up a wind mill or a sun collector.

但建立风车或收集器需要大量资金。

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at the weekend, at the word of command, at the worst, at this time of year, at times, at variance, at war, at weekends, at will, at work,

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3G, 401(K), a,
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