If, for example, it's cold and overcast outside and its building's internal temperature is below a given desired temperature, the device would generate its effort to heating the building.
例如，天气冷阴，其建筑物的内部温度低于某一特定需要的温度时，设备会提高功率加大产热效能来提高建筑物的温度。
Its much too cold outside. Youd better put on your overcoat.
外面太冷了，你最好把大衣穿上。
Its been a few days, and everyday the sky is gray and very cold outside.
这几天每天的天空是灰色，外面非常冷。
Its been a few days, and everyday the sky is gray and very cold outside.
这几天每天的天空是灰色，外面非常冷。
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