Freezing the meat at very low temperatures can kill parasites. The USDA recommends freezing beef at -4°F (-20°C) for at least 7 days or at -31°F (-35°C) for 15 hours to kill parasites like tapeworms.
【 在 ruhetou 的大作中提到: 】
: 超低温处理的是海鲜类(譬如三文鱼),牛肉没这么处理吧。
:
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FROM 98.42.117.*