1. Once bitten,twice shy. 吃一堑，长一智 一人计短，二人计长 一朝被蛇咬，十年怕井绳 2. One boy is a boy, two boys half a boy, three boys no boy. 三人行必有我师 一个和尚挑水喝，两个和尚抬水喝，三个和尚没水喝 事半功倍 3. One eyewitness is better than ten hearsays. 事实胜于雄辩 快门提示音 眼见为实，耳听为虚 4. One man＇s fault is other man＇s lesson. 失败是成功之母 原谅一个人的错误等于促使他犯罪 前车之鉴 5. One＇s words reflect one＇s thinking. 言为心声 表里如一 言行一致 6. Out of office, out of danger. 职场险滩多 无官一身轻 两袖清风 7. Out of sight, out of mind. 事实胜于雄辩 眼不见，心为净 胸无大志 8. Like the eight immortals crossing the sea, each one showing his or her special prowess. 泥菩萨过河，自身难保 八仙过海 ,各显神通 书山有路勤为径，学海无涯苦作舟 9. what goes around comes around . 自食恶果 原路返回 种瓜得瓜，种豆得豆 10. If the old dog barks, he gives counsel . 不听老人言，吃亏在眼前 狗仗人势 忠言逆耳利于行