expansion：张开，伸展；扩张，膨胀

词根词缀：ex-出 + -pans-延伸,扩展 + -ion

• aerodrome
• aerodynamics
• aerofoil
• aerogramme
• aerology
• aeromarine
• aeronaut
• aeronautics
• aeroneurosis
• aeroplane
• aerosol
• aerospace
• aerosphere
• aerostat
• aesculapian
• Aesopian
• aesthete
• aesthetic
• aesthetics
• aetiology
• af-
• afara
• affable
• affair
• affect