yolkKK [jok] /joʊk/發音名詞1蛋黃、卵黃She separated the yolk from the white before making the cake.她做蛋糕前先把蛋黃和蛋白分開。2卵黃生物學The developing embryo feeds on the yolk inside the egg.發育中的胚胎以蛋內的卵黃為養分。