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美国是一个森林资源很丰富的国家,也是森林资源管理先进的国家。现就美国森林健康的概念简述其美国是如何进行森林管理的。
The United States is a country rich in forest resources and an advanced country in forest resources management. Briefly describe how the United States manages forests on the concept of forest health in the United States.