曾看过这样一个故事:一位西方哲学家无意间在古罗马城的废墟里发现了一尊“双面”神像。哲学家问他为何两副面孔。他回答说: “因为这样才能一面察看过去,以记取教训;一面瞻望未 I have seen a story in which a Western philosopher inadvertently discovered a “double-sided” statue in the ruins of the ancient Roman city. The philosopher asked him why he had two faces. He replied: "Because of this, we can look at the past one by one to learn lessons;