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But when Swetnam enrolled in graduate school at the University of Arizona’s Laboratory of Tree-Ring Research, he was surprised to find a record of repeated blazes dating back hundreds of years before European colonists arrived on the continent.
但当斯韦特纳姆进入亚利桑那大学树木年轮研究实验室读研究生时,他惊讶地发现了一份反复发生火灾的记录,这些记录可以追溯到欧洲殖民者抵达这片大陆之前的数百年。
Some of the trees he analyzed bore more than 20 fire scars among their rings.
他分析的一些树木的年轮中留有20多处火疤。
Their North American tree-ring fire-scar network (NAFSN) provided the basis for a study published last month.
他们建立的北美树木年轮火疤网络(NAFSN)为上个月发表的一项研究提供了基础。
the scarcity of tree-ring research in the U.S.
美国树木年轮研究的匮乏。
Long is Britain’s best-known Land Artist and his Stone Circle, a perfect ring of purplish rocks from Portishead beach laid out on the gallery floor, represents the elegant, rarefied side of the form.
朗是英国最著名的大地艺术家,他的《石圈》——用波蒂斯黑德海滩上的紫色岩石在画廊地板上摆成的一个完美圆环——代表了这种艺术形式优雅、高雅的一面。