1、During pregnancy, the deciduate cells lining the uterus are shed during menstruation. （在怀孕期间，子宫内壁的脱落细胞在月经期间脱落。）

2、The reptile's skin cannot regenerate, so it undergoes a process called deciduation where old skin cells are shed and replaced by new ones. （爬行动物的皮肤不能再生，所以它们经历一种叫做脱皮的过程，旧的皮肤细胞脱落并被新的细胞所取代。）