VOA慢速英语:美国国会大厦简史

symbol - n. an action, object, event, etc., that expresses or represents a particular idea or quality

swamp - n. land that is always wet and often partly covered with water

architect - n. a person who designs buildings

dome - n. a large rounded roof or ceiling that is shaped like half of a ball

brick - n. a small, hard block of baked clay that is used to build structures

cast - n. a hard covering

forge - v. to form something by heating and shaping metal

elevator - n. a machine used for carrying people and things to different levels in a building