前不见古人 ,后不见来者 ,念天地之悠悠 ,独怆然而涕下 !存活于世的人类何曾会晤过其前辈 ,又何能遇见其后人。时间一去不复回 ,历史已定格尘封 ,再也不会重现。历史固然是裹着粘满尘土的衣服 ,附着迷幻的装饰 ,但却由于已然性和时间的单向性而获得了永恒 ,从而又未尝不是真实 Before seeing the ancients, they did not see anybody coming afterwards, and they read the world and leisurely, but left alone! The human beings who lived in the world have met with their predecessors, and how can they meet their descendants. As time goes on, history has been frozen and it will never be repeated. Although history is covered with dusty clothes and psychedelic decoration, it is eternal because of the unidirectionality of nature and time, and it is not untrue.