人类环境的保护和改善是影响到世界人民幸福和经济发展的主要问题。
The protection and improvement of the human environment is a major issue which affects the well-being of peoples and economic development throughout the world.
中国庞大的经济规模意味着，尽管她还不能与美国的经济实力分庭抗礼，但是她的确拥有影响其周边国家经济发展前景的能力。
China's massive size means that, though it is not yet a rival for the economic might of the United States, it does have the ability to influence the prospects of countries far beyond its borders.
机场业是民用航空业的重要基础性行业，对国民经济发展以及国家安全具有重要影响。
Airport industry is an important fundamental industry of civil aviation, and it has significant influence on the development of national economy and the safety of the state.
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