楼主: 忘川河水悠悠蓝
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20岁的小花痴露露小朋友生日快乐 |
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不以物喜,不以己悲.
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破釜沉舟 百二秦關終屬楚
臥薪嘗膽 三韆越甲可吞吳 什么都变了,浮云 |
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以模型进行思考的艺术远非易事,这主要是因为它是一种非同寻常的实践.(约翰・梅纳德・凯恩斯より)
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