VOA慢速英语:美国参议员在性侵指控后辞职

chamber - n. a large room where members of a legislature meet

a line in the sand - idiom, a limit to what one will accept or a point beyond which one will not go

standard - n. a level of quality or achievement that is considered desirable

institution - n. an established organization

irony - n. a situation that is strange because things happen in the opposite of what you expect

brag - v. to talk about yourself in a way that show too much pride

prey - v. to hurt someone