Use egg whites and egg substitute if desired.
利用鸡蛋的白人和鸡蛋代替的话。
The scientists also use DNA technology to make sure that the drugs are only inside the egg whites.
科学家们还使用DNA技术来确保药物只存在于蛋白中。
Never use aluminium, which reacts with the egg whites causing them to turn slightly gray.
而铝制品就完全应该避免使用了，因为铝会使蛋白变灰。
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