At the same time, nearly half of U.S. carbon emissions come from heating, cooling and powering our homes, offices and other buildings.

与此同时，美国人近一半的碳排放来自供暖、制冷以及为家庭、办公室和其他建筑供电。

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But at the same time, nearly half of U.S. carbon emissions come from heating, cooling and powering our homes, offices and other buildings.

但与此同时，美国人近一半的碳排放来自供暖、制冷以及为家庭、办公室和其他建筑供电。

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It is found that the floor surface temperature variety exponentially with time after the change of water condition, and the heat lag in the heating period is about half of that in cooling period.

发现供水状态变化后，地板表面温度随时间呈指数变化，升温期的稳定时间约为降温期的一半。

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