单词	mid vowels
释义	mid vowels 中元音
随便看	helicopter flight dynamics helicopter flight performance Helicopter flight simulation Helicopter Flight Squadron helicopter floata tion gear Helicopter flying straight and level helicopter forbidden region helicopter gas turbine helicopter gearbox helicopter gravity Helicopter Gravity-Measuring System helicopter ground resonance helicopter gun helicopter gunship helicopter-gunship helicopter gunships helicopter hangar Helicopter Hauldown and Rapid Securing Device helicopterhel helicopter hoist helicopter hovering Helicopter Icing Spray System helicopter identification by radar detection Helicopter in-Flight Monitoring System Helicopter in-Flight Refueling