VOA慢速英语:Large Creature Swam the Seas 170 Million Years Ago

monster – n. a strange or horrible imaginary creature

paleontologist – n. a scientists who studies fossilized bones of ancient animals and plants

reptile – n. an animal that has cold blood, that lays eggs, and has a body covered with scales or hard parts

cone – n. a shape that is pointed on top and sides that form a circle at the bottom

ecosystem – n. everything that exists in an environment

winnow – v. to remove things that are less important form a larger group

trickle – v. to flow or fall in drops

hump – n. a rounded lump on the surface of something