auld lang syne

(Scot 苏格兰) (title of a popular song sung esp at the beginning of each new year and expressing feelings of friendship for the sake of) good times long ago 美好的往日（歌曲名, 尤於新年时及抒发对往日友谊之情时唱的）.

audio frequency, audio typist, audio-, audio-visual, audit, audition, auditor, auditorium, auditory, Aug, auger, aught, augment, augmentation, augmented, augur, augury, August, Augustan, auk, aunt, Aunt Sally, auntie (also aunty), aura, aural, aurally, aureola, auricular, aurora, auspice, auspices, auspicious, Aussie, austere, austerely, austerity, Australia, Australian, Australian Rules, Austria,