the yellow spherical part of an egg that is surrounded by the albumen. 蛋的黄色球状部分,被蛋白所包围。
The yellow, usually spherical portion of an egg of a bird or reptile, surrounded by the albumen and serving as nutriment for the developing young. 蛋黄鸟类或爬行动物蛋内的黄色的、通常是球形的部分,回周包有蛋白,作为哺育幼鸟(仔)的营养物