VOA慢速英语:美国第46任总统拜登宣誓就职 演说呼吁“团结”

triumph –n. a great or important victory

prevail –v. to defeat an opponent

challenged –adj. to have faced difficulties or problems

elusive –adj. hard to find or capture

concrete –n. a hard building material made from rock

wreath –n. a circular arrangement of leaves and flowers used as a sign of honor or victory