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炖鸡为什么先大火后小火
更新时间: 2020-10-04 00:00:00  

原因:煮食物时,并不是火越大越旺就煮熟得越快,因为水沸腾时的温度是不变的,即使加大火力,也不能提高水温,只是加快了水的汽化,浪费了燃料。水的沸点是100,到100了再大火也是这个温度,先大火是为了快点开水,小火长时间炖可以入味,营养也更均匀。

关键词: 为什么 大火

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