单词	acetylene
释义	acetylene /əˈsɛtɪliːn / noun Chemistry A colourless pungent-smelling hydrocarbon gas, which burns with a bright flame, used in welding and formerly in lighting. Alternative name: ethyne; chemical formula: C2H2. Observers have long known that Titan's atmosphere contains methane, ethane, acetylene and many other hydrocarbon compounds.... A delicate 24-hour cooling operation saw roads and houses cordoned off as the emergency services tried to prevent the acetylene, propane and oxygen cylinders from exploding in Thornton Heath. Acrylonitrile is another product of acetylene, formed in a reaction with hydrogen cyanide. Origin Mid 19th century: from acetic acid + -yl + -ene.
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