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in the 1970’s;in her twenties in 1970s;in her twenties in the 1970s;in her twenty in the 1970s;in the twenty
1970; the 50’s the 1970; his 50s the 1970s; his fifties 1970s; his fifties
enjoyed the lowest net growth of population in history witnessed a southwestern shift of population underwent an unparalleled period of population growth brought to a standstill its pattern of migration since World War Ⅱ
two-thirds;1970 two-thirds;1970s two-third; 1970 two-third;1970s
two-thirds; 1970 two-thirds; 1970s two-third; 1970 two-third; 1970
two thirds; 1970 two thirds; 1970s two third; 1970 two third; 1970s
the first the second the third the fourth
two-thirds, 1970 two-thirds, 1970s two-third, 1970 two-third, 1970s
two-thirds, 1970 two-thirds, 1970s two-third, 1970 two-third, 1970s
不填; the; much the; the; small 不填; the; large the; a; small
two thirds; 1970 two thirds; 1970s two third; 1970 two third; 1970s
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