Agricultural labor force aging; Land resources use efficiency; Inverted "u" type curve.

农业劳动力老龄化；土地资源利用效率；倒“U”型关系。

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The main objectives of this article are to review the efforts toward land use and transportation integration in the U. S, and to draw relevant implications to China's planning practice.

文章的主要目标是评论美国交通与土地利用整合的实践，同时试图针对中国的城市规划实践提出建议。

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It came into being in 1920 'as an effort to resolve problems cropped up in the exercise of land use right almost free of any public restraints in the u.

它为解决美国几乎无限制的土地使用自由引发的问题在20世纪20年代应运而生。

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That variable is called the indirect land use charge, and the U.S. and Europe are coming up with very different answers for it.

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The research looked specifically at production farms using open, outdoor fresh water ponds applying current technology, and considered such factors as suitable land use, topographical features, weather patterns and sky conditions available in the contiguous U.S. states.

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Any new government will need to address U.S. ties in the wake of roller-coaster relations between the two countries in recent years ahead of ahead of 2014 U.S. withdrawal from Afghanistan, which depends on the use of land routes through Pakistan.

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