A yellow carotenoid pigment C40H56O2 found widely in nature first isolated in corpus luteum but later discovered in body fats egg yolk and green plants ; xanthophyll .

叶黄素一种 黄色的类似胡萝卜素的色素，c40h56o2，大量存在于自然界中，最初从黄体素中分离出来，后在体内脂肪、 蛋黄、绿色植物中也发现了它的存在；胡萝卜醇。

It landed on a pile of firewood where the yellow yolk burst into flames .

鸟蛋掉到一堆柴火上， 蛋黄 随即迸发出 黄色的火焰。

A kind of tree whose fruit has only one seed surrounded by yellow pulp which looks like a yolk .

树名，其果实？有一颗种子，果肉呈 黄色，看来像一个 蛋黄。

A yellow phospholipid found in egg yolk and in many plant and animal cells ; used commercially as an emulsifier .

一种 黄色的磷脂，见于 蛋黄和许多植物动物细胞中，商用作乳化剂。