根据为他写传记的柏拉图和色诺芬的记载，苏格拉底不仅仅只是研究了生命的意义，还研究了我们自己生活的意义。

According to his biographers Plato and Xenophon, Socrates did not just search for the meaning of life, but the meaning of our own lives.

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“柏拉图的书在建立西方文化中扮演了重要角色，但它们也很神秘还留下了千古之谜，”他说。

Plato's books played a major role in founding Western culture but they are mysterious and end in riddles, "he said."

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But the Platonic forms, as we also know, are not to be found in this world.

但是我们还知道,现实世界中没有柏拉图型相

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You recall when we talked about Plato, we introduced the notion of essential properties.

你们还记得我们说起柏拉图的时候，我们介绍了基本性质的概念。

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Even the Platonic just city will have to cultivate warrior citizens who are prepared to risk life in battle for the sake of their own city.

就算是柏拉图式的正义之城,也都还需要培养战士,一群准备好以生命作赌注,来捍卫其所属城市的公民。

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