VOA慢速英语:Algae May Help Feed a Hungry World

resources – n. a usable stock or supply, such as money, land or water

fatty acids – n. an acid that is naturally in fats and various oils

lipids – n. any one of various substances that contain fat and that are important parts of living cells

powder – n. a dry substance made up of very tiny pieces of something

edible – adj. suitable or safe to eat

synthetic – adj. made by combining different substances : not natural

substitute – n. a person or thing that takes the place of someone or something else