Many houses in the north are warm in winter because they are insulated so that the heat is not lost.
"
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.
"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。"
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