VOA慢速英语:Researchers Remember Discovery of Lucy Skeleton

relevant - adj., relating to a subject in the right or correct way

origin – n., the point or place where something begins or is created

paleoanthropology – n., the study of origins and ancient humans and their primate relatives chiefly by examining fossils and other human remains

scholar(s) - n. a person who has studied a subject for a long time and knows a lot about it