整个国家风景保护系统和所谓的跨部门年票并不包括州立单位，如大量的州立公园（State Park）、州立森林（State Forest）以及郡县级的公园（County Park）。所以在这些地方都需要额外购票。
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Mother Earth是一家私人运营的幼儿园，目前有14名儿童，他们每天有4个小时是在州立公园的森林里度过的。
The 14 children spend four hours a day at the privately run school playing in a state park forest.
北卡罗莱纳州立大学的Rodrigo Arriagada和他的同事认为生态系统付费方案对有效减少10%的农场里部分森林退化做出了贡献。
Work by Rodrigo Arriagada of North Carolina State University and his colleagues suggests that the PES scheme was responsible for only 10% of the reduced deforestation on farms that took part.
偶朋友马特住在马里兰哈佛特郡的岩石州立公园四周，故事就发生在环绕他家的那片森林。
The events are centered around the woods that surround my friend Matt's house, which is in Rocks State Park in Harford County, Maryland.
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