Propylene,the common petroleum gas,is subject to gasification under heating and liquification under pressure.
丙烯是一种受热

、受压
液
的常用石油
。
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As much of Europe sweltered under heat domes, the International Energy Agency warned that " a cold winter, together with a full halt of Russian piped gas supplies to the European Union" could cause natural-gas prices to rise again.
由于欧洲大部分地区
穹顶现象影响闷
难当,国际能源机构警告称,“寒冷冬季以及俄罗斯对欧盟天然气管道供应全部中断”,可能
导致天然气价格再次上涨。