VOA慢速英语:Sweet Potatoes as Medicine

supplement – n. medical : (dietary) a product containing ingredients such as vitamins or amino acids that are taking in addition to food, but are not considered food

deficient – adj. not having enough of something that is important or necessary

diarrhea – n. medical : an illness that causes you to pass waste from your body very frequently and in liquid rather than solid form

impact – n. a powerful or major influence or effect : impact can also be used as a verb

intervene – v. to become involved in something in order to have an influence on what happens : intervention is the noun

millet – n. a type of grass that is grown for its seeds which are used as food