Donald Worster is a leading environmental historian in the United States who has made a great contribution to the studies of world environmental history.
唐纳德·沃斯特是美国著名的环境史学家，对世界环境史研究作出了突出贡献。
Donald Worster is a leading environmental historian in the United States who has made a great contribution to the studies of world environmental history.
唐纳德·沃斯特是美国著名的环境史学家，对世界环境史研究作出了突出贡献。
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