单词	lower mast
释义	lower mast noun : the lowest part of a compound mast composed of two or more poles compare topmast Word History First Known Use 1656, in the meaning defined above
随便看	aerodynamic aerodynamical aerodynamically aerodynamicist aerodynamicists aerodynamics aerodyne aerodynes aeroelastic aeroelasticities aeroelasticity aeroembolism aeroembolisms aeroengine aeroengines aerofilter aerofoil aerofoils aerogel aerogels aerogenerator aerogeneratores aerogenerators aerogeography aerogeologist

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