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”.
在过去，房屋无论是气派还是朴素，都是基于供暖或供电有限的假设而建造的。直到相当晚近的时候，大多数家庭还是地地道道的“离网”建筑。
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