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1.煮蛋的变化鸡蛋煮的时间过长,蛋黄表面则呈灰绿色.这是蛋黄中的亚铁离子与蛋白中的硫离子
1. boiled eggs change the egg boiled for too long, the egg yolk surface is gray-green.This is the ferrous iron in the egg yolk protein and sulfide