n.生日；诞辰；成立纪念日； 变形： 复数：birthdays 双语释义：n.(名词)[C]生日 (anniversary of the) day of a person's birth英英释义： birthday[ 'bə:θdei ]n.an anniversary of the day on which a person was born (or the celebration of it)the date on which a person was born同义词：natal day