... 火山灰地层学 tephrostratigraphy 火山灰结构 ash structure 火山灰流 ash flow ...
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Ash Wood Structure 灰木结构
ash h structure 火山灰构造
ash melt structure 熔体结构
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They will record plant species, forest structure, ash cover, soil properties, river sediment and the overall topography of the burned area.
ECONOMIST: A 30-year plan to study America��s ecology is about to begin
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