北方的许多房子在 冬天很暖和
Many houses in the north are warm in winter
以上为机器翻译结果，长、整句建议使用 人工翻译 。
北方的许多房子在冬天很暖和，因为它们都作了隔热处理，使热量不致散失。
Many houses in the north are warm in winter because they are insulated so that the heat is not lost.
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