| 释义 |
二氧化碳èryǎnghuàtàn无机化合物,化学式CO?。无色无臭的气体,比空气重,空气中含量约为0.04%。动物呼吸时吸入氧气,呼出二氧化碳;绿色植物进行光合作用时放出氧气,吸入二氧化碳。用来制纯碱、清凉性饮料等,也用来灭火。{carbon dioxide; carbonic-acid gas; carbonic anhydride; colourless, odourless gas, chemical formula CO?, heavier than the air and occupying 0.04% of the atmosphere, produced during respiration by animals and humans who inhale oxygen and exhale carbon dioxide, and consumed during the photosynthesis of green plants that inhale carbon dioxide and exhale oxygen, used extensively in manufacturing soda ash and soft drinks, and in fire extinguishers as well;}也叫also碳酐{tàngān}或{or}碳酸气{tànsuānqì}。 |