皮蛋

1.Pidan is prepared from raw duck egg by alkaline treatment.

摘要皮蛋是生鸭蛋经由碱处理的。

2.The authors put forward a theory of "four-stages"in mature period of preserved eggs, i.e. hydrade stage, solidifying stage, basic mature stage and afterripening stage.

作者经试验研究,提出了一种皮蛋熟的“四段”理论。