VOA慢速英语:实验疫苗可能有助于阻止埃博拉病毒的传播

epidemic – n. an occurrence in which a disease spreads very quickly and affects a large number of people

resource – n. a supply of something that can be used when it is needed

extensive – adj. large in size or amount; very full or complete

benefit – n. something that produces good or helpful results

license – n. official permission for something

properly – adj. exactly correctly; demonstrating good behavior

outbreak – n. a sudden start or increase of fighting or disease

dose – n. the measured amount of a drug, to be taken at any one time