| 释义 |
〔firedamp〕A combustible gas, chiefly methane, occurring naturally in mines from the decomposition of coal.沼气：一种在矿坑里由煤腐烂而自然产生的可燃气体，主要成分是甲烷〔Freon〕A trademark used for a variety of nonflammable gaseous or liquid fluorinated hydrocarbons employed primarily as working fluids in refrigeration and air conditioning and as aerosol propellants.氟利昂：一种用于一些不可燃气体或液体烷属烃的商标，主要用于制冷、空气调节和推进剂 |