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是不是还有一个叫阿鸡米得的老家伙琢磨过这事儿？他很聪明的，把被子放进水里就全明白了，你也试试？
eglington
(eglington)
(#29345@0)
Last Updated: 2001-2-28
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原来空气没重量！我一条12斤的被子，抽成真空还是12斤！
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