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出自唐代詩人韋應物《寄李儋元錫》，梁羽生在《大唐游俠傳》中引用

Psychology should be the science of mental life, both of its phenomena and of their conditions.

"The best way to avoid trouble is to stay out of it."

最好的水產養殖實踐是后代無需推翻的做法。