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.
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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