Under normal atmospheric conditions, carbon dioxide exists as a colorless, odorless gas which is about 1.5 times heavier than air.
在正常大气压下，二氧化碳是无色无味气体，密度比空气大，是空气的1.5倍。
However, it is resistant to most alkalis, salts, waters, food products, organic substances and atmospheric conditions at normal and elevated temperatures.
然而硫攻击，这是最碱，盐，水，食品，有机物质和大气耐在正常和高温的条件。
If a flammable cryogenic liquid is involved, the flammable mixture zone, under unusual atmospheric conditions, may extend beyond the normal fog cloud produced by condensing water vapor in the air.
如果同易燃低温液体有关，在异常大气条件下，易燃混合物地带会延伸到空气中的水蒸汽的浓缩产生的正常雾云以外。
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