VOA慢速英语:科学家发现了已知最大最古老的玛雅结构

rectangle – n. an object with four straight sides and four right angles, and opposite sides are of equal length

pyramid – n. a large structure built especially in ancient Egypt that has a square base and four triangular sides which form a point at the top

clay – n. a sticky, fine-grained material

three-dimensional – adj. having length, width, and depth

cattle – n. large animals grown for their meat; cows

ranch – n. a large farm where cattle or other animals are raised

jade – n. a usually green stone that is used for jewelry

axe – n. a tool that usually has a heavy metal blade and a long handle and that is used for chopping wood