VOA慢速英语:科学家发现奇怪的海洋蠕虫化石

fossil – 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

grasp – v. to take and hold (something) with your fingers, hands, etc.

spine – n. a sharp, pointed part on an animal or plant

predator – n. an animal that lives by killing and eating other animals: an animal that preys on other animals

decay – v. to be slowly destroyed by natural processes: to be slowly broken down by the natural processes that destroy a dead plant or body

animation– n. a way of making a movie by using a series of drawings, computer graphics, or photographs of objects (such as puppets or models) that are slightly different from one another and that when viewed quickly one after another create the appearance of movement