The problem is that household freezer doesn't go as low as

来源: 阿椿 于 2009-12-04 18:17:40 [] [博客] [旧帖] [给我悄悄话] 阅读数 : 0 (15 bytes)
回答: Not safe. read this: 由 阿椿 于 2009-12-04 17:48:54

-20°C (-4°F)

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