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。

youdao

This paper describes the history of Japanese urban green space and system and summarizes the characteristics of park system.

本论文主要考察日本城市公园绿地及其制度的历史演变过程，总结了其公园绿地体系的特征。

youdao

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。

youdao

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

Twenty percent is put into a shared fund for use throughout the park system.

VOA: special.2009.09.28

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

CNN: Gov. Whitman Lauds Ellis Island Decision

It creates thousands of miles of new scenic, historic, and recreational trails, cares for our historic battlefields, strengthens our National Park System.

WHITEHOUSE: President Obama Signs Major Public Lands Protections

Greg Hare, an anthropologist with the provincial park system in the Canadian Yukon, has picked up more than 130 objects in the past five years.

NPR: History Emerging from the Ice