VOA慢速英语:美国基督教白人人数创新低

dominant - adj. most common

evangelical - adj. ​of or relating to a Christian sect or group that stresses the authority of the Bible, the importance of believing that Jesus Christ saved you personally from sin or hell, and the preaching of these beliefs to other people​

affiliation - n. ​ the state of being closely associated with or connected to an organization, company, etc.​

shift - v. to change or to cause (something) to change to a different opinion, belief, etc.​