A tree is known by its fruit. 观其行而知其人。
A word spoken cannot be recalled. 一言说出，难以收回。
A word to the wise is enough. 聪明人不用细说。
A work ill done must be twice done. 工作未干好，只得重返工。
Act fairly by all men. 一视同仁。
Actions speak louder than words. 事实胜于雄辩。
Adversity makes a man wise, not rich. 困难和不幸不能使人富有，却能使人聪明。
After rain comes fair weather. 否极泰来。
After supper walk a mile. 饭后百步走，活到九十九。
All are not friends that speak us fair. 说好话的不一定都是朋友。
All beginnings are hard. 万事开头难。
All men can't be first. 并非所有的都能获第一。
All roads lead to Rome. 处处有路通长安。
All things are difficult before they are easy. 万事开头难。
All work and no play makes Jack a dull boy. 只工作而无娱乐会使人愚钝。
An apple a day keeps the doctor away. 一天一个苹果，医生不来找我。
An empty bag cannot stand upright. 空袋子放不真。
An evil lesson is soon learned. 学坏容易。
An honest man's word is as good as his bond. 君子一言，驷马难追。
An hour in the morning is worth two in the evening. 一日之计在于晨。
An idle youth, a needy age. 少壮不努力，老大徒伤悲。
An ill workman quarrels with his tools. 不会撑船怪河弯。