VOA慢速英语:US Has a Long History of Restricting Immigrants

executive - adj. an order by the president

origin - n. the point or place where something begins or is created

petition - v. a written document that people sign to show that they want a person or organization to do or change something

quota - n. an official limit on the number or amount of people or things that are allowed

slightly - adv. n a very small amount or degree

eliminate - v. to get rid of something

overt - adj. obvious