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据说把陶瓷杯放入水里可以用钉子打孔，杯子还不会破！是真的吗？
据说把陶瓷杯放入水里可以用钉子打孔，杯子还不会破！是真的吗？实测物理小实验
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据说把陶瓷杯放入水里可以用钉子打孔，杯子还不会破！是真的吗？实测物理小实验
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