The indoor temperature of old classrooms is somewhat low because cold wind seeps seriously and heat loses excessively.

老教室门窗渗透严重，热能损失过多，室内温度偏低。

youdao

The indoor temperature of old classrooms is somewhat low because cold wind seeps seriously and heat loses excessively.

老教室门窗渗透严重，热能损失过多，室内温度偏低。

youdao