英语听力精选进阶版 13769（在线收听） |
America's changing identity Vocabulary census bureau office of national statistics ethnic and racial minorities people whose racial origin is from another country e.g. Mexicans who live in the USA shift change steepest most extreme account for explain why a sweeping change a wide-ranging difference the racial make-up the balance of people of different ethnic origin demographic characteristics of a population diverse varied trends tendencies |
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