VOA慢速英语:美国大选选举观察员的历史和作用

site - n . the place where something (such as a building) is, was, or will be located

poll - n. the record of votes that were made by people in an election

challenger - n. someone who says or shows that (something) may not be true, correct, or legal

character - n. the way someone thinks, feels, and behaves : someone's personality

sponsor - v. to support or pay for the cost of an activity or event

procedure - n. a series of actions that are done in a certain way or order : an established or accepted way of doing something