求翻译：第二次世界大战爆发，美国经济才得以因大规模军工生产而摆脱萧条，并迅速走向繁荣，对劳工的需求急剧上升，这为黑人第二次大迁徙提供了条件，仅1940～1945年间，就有60多万黑人离开南部农村涌入美国各地工业中心是什么意思？

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The Second World War broke out, the United States economy has been able to Due to the large-scale military production and out of recession, and rapidly move toward prosperity, and a sharp rise in the demand for labor, and this is the second largest black movement, only provides the conditions for 19

The Second World War erupts, the American economy only then can get rid of the depression because of the large-scale military production, and the rapid trend prosperity, rises suddenly to laborer's demand, this has provided the condition for the black second big migration south, the only during 1940

Second World War broke out, United States economy were able to get rid of depression because of massive military production, and quickly toward prosperity, sharp rise in the demand for labour, which has provided the conditions for the second great migration blacks, 1940-1945 alone, there are more th

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