容器隻有幾百年壽命，廢料需要幾千幾萬年來衰減， do the math.

來源: 燕京十景於 2019-11-23 14:07:12 [舊帖] [給我悄悄話] 本文已被閱讀：次

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容器隻有幾百年壽命， 廢料需要幾千幾萬年來衰減， do the math.