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The most mysterious feminine factor, the existence that we men, we don't know. It's woman. It's feminine. That's what the sword is about. That's the symbolic meaning of the sword.

最神秘的女性因素，是我们男人不知道的存在。这是女人。这是女性。这就是剑的作用。这就是剑的象征意义。

— Ang Lee 李安