N the yolk of an egg, such as a hen's egg, that undergoes meroblastic cleavage 副胚层; 蛋黄，如母鸡蛋黄，经历了不完全分裂
parablast theory副胚层学说
parablast t副胚层
N（名词） the yolk of an egg, such as a hen's egg, that undergoes meroblastic cleavage 副胚层; 蛋黄，如母鸡蛋黄，经历了不完全分裂