VOA慢速英语:美国国会大厦的建筑是什么?

confident - adj. having a feeling or belief that you can do something well or succeed at something

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

vast - adj. very great in size, amount, or extent

tiara - n. a small crown

bulge - n. a rounded lump on the surface of something

symbol - n. an object that expresses a particular idea

confuse - v. to mistakenly think that one person or thing is another person or thing

joint - adj. combining the work of two or more groups of people