长久以来，美国人口频繁流动，为美国经济实力壮大做出了巨大贡献。因为人口流动能够扩大高效劳动力市场，降低失业率。
A high degree of population mobility has traditionally been one of America's great economic strengths, providing a flexibility that allows for more efficient Labour markets and lower unemployment.
因为我想找到一家我真的愿意长期为之效劳的理想中的公司，然后我会安定下来，并做出长久的贡献。
Because I want to find an ideal company that I really want to work for for a long period of time, and then I would settle down and make a long-term contribution.
说明在产出的变化中，资本对产出的贡献程度最大，有效劳动和土地生产力次之。
It means that capital gives the biggest share to development, and effective labor and land productivity give less.
说明在产出的变化中，资本对产出的贡献程度最大，有效劳动和土地生产力次之。
It means that capital gives the biggest share to development, and effective labor and land productivity give less.
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