In times gone by, homes both grand and modest were of necessity built on the assumption of limited heating or power supplies. Until relatively recently, most households were distinctively “off grid”.
在過去，房屋無論是氣派還是樸素，都是基於供暖或供電有限的假設而建造的。直到相當晚近的時候，大多數家庭還是地地道道的「離網」建築。
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