单词	retention aid
释义	retention aid 助留剂
随便看	instrument measuring torsional vibration instrument mechanic instrument meteorological condition instrument meteorological condition flight instrument meteorological conditionimc instrument meteorological conditionimcflight instrument meteorological condition imc flight instrument meteorological conditions instrument meteorological conditionsimc instrument meteorological conditions imc instrument metering instrument method instrument microcomputer Instrument Missed Intercept Instrument Mission Accomplished instrument mixing instrument mode Instrument Modeling instrument mode select coupler instrument module instrument monitor instrument monitoring instrument motor instrument mounting instrument mounting plate