VOA慢速英语:美国外国出生人口百年来最高

census – n. counting of people living in an area to

trend – n. a general direction of change :

survey – n. an activity in which many people are asked a question or a series of questions in order to gather information about what most people do or think about something

informal – adj. not requiring serious or official behavior

factor – n. something that helps to produce a result

bureau – n. a specialized office or agency

resident – n. someone who liv