A bit further back, Teddy Roosevelt founded the national park system, among other efforts to conserve the natural heritage of the United States.

再稍往前，连同保护美国自然遗产的努力，泰迪·罗斯福建立了国建公园制度。

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His writing and speaking raised the awareness of the importance of conservation and helped bring about our national park system.

他的写作和演讲提高了人们对保护自然的重要性的认识，并帮助建立了我们的国家公园系统。

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Using Geographic Information System(GIS), the change of landscape pattern in Zhangjiajie National Forest Park during 1990—2000 was studied.

利用地理信息系统（GIS）技术，研究1990—2000年张家界国家森林公园景观格局的变化。

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But Congress has put more into the budget of the national park system in the past three years.

VOA: special.2009.09.28

Last year, almost two hundred seventy-five million people visited the national park system in the United States.

VOA: special.2009.09.28

They carved the first hiking trail to the top of Mt.Whitney, the highest mountain in the continental United States and they built the first museum in the National Park system.

VOA: standard.2009.11.25

The entire island remains under U.S. government ownership as part of the national park system.

CNN: Gov. Whitman Lauds Ellis Island Decision

The new extension surrounds the Bosque Fray Jorge National Park with a new zoning system to implement the Statutory Framework.

UNESCO: EDUCATION

The Glyder Fawr measurements were taken by national park staff who trapped a global positioning system (GPS) antennae to the side of the summit rock.

BBC: New height makes Snowdonia peak 'super mountain'