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范德韦尔
The letter was written by Darwin to thank an American geologist, Dr.Ferdinand Vandeveer Hayden, for sending him copies of his research into the geology of the region that would become Yellowstone National Park.
2018年6月四级真题（第二套）阅读 Section C
英汉双解词典包含4367426条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。