开先例

set a precedent;set an example

• aeronomy
• aerosol
• aerosol dispenser
• aerospace medicine
• aery
• aeschines
• aeschylus
• aesculapius
• aesculapius:
• aesir
• aesop
• aesop:
• aesop’s fables
• aesthematology
• aesthetics
• aethelber(h)t
• aethelber(h)t ⅰ
• aethelflaed
• aethelred ⅱ
• aethelwulf
• aetiology
• aetius，flavius
• aetolia
• aetolian league
• a-factor