这些学生小时候大多没有机会到野外、野生动物保护区或国家公园旅游。
These are mostly students who had no opportunity as children to travel to wilderness areas, wildlife refuges or national parks.
九寨沟国家公园是一个自然保护区，位于四川省北部。
Jiuzhaigou National Park is a nature reserve in the north of Sichuan Province.
位于费城市中心区的独立国家公园被称为“美国最具历史意义的一平方英里”。
The Independence National Historic Park is located right at the heart of downtown Philadelphia.
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