基本解释【胚胎學】卵黃（囊）帶 卵黃柄英汉例句雙語例句The yolk sac and yolk stalk on one of them were well preserved.觀察了三例人胚外形，其中一例還有保存良好的卵黃囊和卵黃蒂。yolk stalk更多例句专业释义生物學卵黃蒂卵黃柄