VOA慢速英语:新出土的骨骼与古代人的亲属关系

species – n. a group of animals or plants that are similar and can produce young animals or plants

extinct – adj. no longer existing

journal – n. a magazine that reports on things of special interest to a particular group of people

cave – n. a large hole that was formed by natural processes in the side of a cliff or hill or under the ground

union(s) – n. an act of joining two or more things together

stumble(d) across – p.v. to discover something accidently

quite – adv. to a very noticeable degree or extent

frequent – adj. happening often

mate(d) – v. o have sexual activity in order to produce young

convincingly – adv. done in a way that causes someone to believe that something is true or certain

fossil(s) – n. something, such as a leaf, skeleton, or footprint, that is from a plant or animal which lived in ancient times and that you can see in some rocks

offspring – n. a person's child

author(s) – n. a person who has written something