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TOEFL BNC: 35761 COCA: 20595
propellant
noun [C/U] /prəˈpelənt/
singularpropellant
pluralpropellants
  1. 1
    a substance used for making something move forwards, for example fuel for sending a rocket into space 推进剂(如把火箭运送到太空的燃料)
     Synonyms and related words
    Substances by function: coolant, diuretic, grease...
  2. 2
    a gas used for forcing a substance out of a spray can when you push the button on top (喷雾罐中的)压缩气体
     Synonyms and related words
    Gases: acetylene, ammonia, argon...

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