...问题已经越来越引起人们的关注,加拿大一项调查表明,室内空气质量问题52%来自室内本身,48%来自供暖、通风及空调系统(IIVAC),这其中又有21%是微生物污染造成的。
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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。
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。
But at the same time, nearly half of U.S. carbon emissions come from heating, cooling and powering our homes, offices and other buildings.
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