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单词
propellant
释义
propellant
NOUN
C
/prəˈpelənt/
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）
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