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.
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