Roses are red and blueberries look blue.But the berry's color is not really true.The fruit's waxy1 coat just masquerades2 as blue.玫瑰是红色的,蓝莓看起来是蓝色的。但蓝莓的颜色并不是真的。这种水果的蜡质外皮只是伪装成蓝色。A waxy covering coats some blue-colored fruits—such as blueberries,dark grapes and certain plums.This wax contains a host of tiny structures,each less th an a th ousandth the thickness of a piece of paper.