Many houses in the north are warm in winter because they are insulated so that the heat is not lost.
"北方的许多房子在冬
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.
"北方的许多房子在冬和,因为它们都作了隔热处理,使热量不致散失。"
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