expansion：张开，伸展；扩张，膨胀

词根词缀：ex-出 + -pans-延伸,扩展 + -ion

• Alma Mater
• almanac
• almighty
• almond
• almost
• alms
• aloe
• aloe vera
• aloft
• aloha
• alone
• along
• alongside
• aloo
• aloof
• alopecia
• alpaca
• alpha
• alphabet
• alphabet
• alphabetic
• alphabetical
• alphahetism
• alphanumeric
• alpine