The heating system has recently been modified to make it more efficient.
暖气设备最近已进行了改造, 使其效率得。
The heating system has recently been modified to make it more efficient.
暖气设备最近已进行了改造, 使其效率得。
This house is unheated and unfurnished.
这座房子没有暖气设备,也没有任何家。
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