VOA慢速英语:食品颜色是天然还是非天然？

artificial- adj. not natural or real; made, produced, or done to seem like something natural

dye –n. a substance used for changing the color of something such as hair or cloth usually permanently

illusions –n. something that looks or seems different from what it is; something that is false or not real but that seems to be true or real

digest – v. to change food that you have eaten by a biological process into simpler forms that can be used by the body

yolk – n. the yellow part in the center of an egg

labeling –n. a word or phrase that describes or identifies something or someone