"三人行，必有我师"可以翻译为 "Among any three people walking, there must be something I can learn from one of them." 或者更简洁的 "In a group of three, there is always someone who can be my teacher." 这句话出自《论语》，意思是即使在三个普通人中，也必定会有一个值得自己学习的地方。