解释His dissertation, one of the first studies to analyze the role of government trade on natural resource use, helped to define the field of conservation economics.
问题描述：
解释
His dissertation, one of the first studies to analyze the role of government trade on natural resource use, helped to define the field of conservation economics.
答
*贸易对自然资源的使用所起的作用
答
*贸易对自然资源的使用所起的作用
他的论文，是第一篇研究*贸易对自然资源使用所起的作用的文章，帮助定义了保护经济学这一领域。
答
the role of government trade on natural resource use
*交易在自然资源利用中的角色.