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单词 tephra
释义

WordReference Random House Unabridged Dictionary of American English © 2024
teph•ra  (tefrə),USA pronunciation n. (used with a pl. v.)
  1. Geologyclastic volcanic material, as scoria, dust, etc., ejected during an eruption.
  • Greek téphra (singular) ashes
  • 1960–65

Collins Concise English Dictionary © HarperCollins Publishers::
tephra /ˈtɛfrə/ n
  1. chiefly US solid matter ejected during a volcanic eruption
Etymology: 20th Century: Greek, literally: ashes
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