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单词 exa-
释义 exa-  exa-  pref.(前缀)One quintillion (1018): 艾可萨:10的18次幂: exahertz.艾可萨赫兹语源:Alteration of hexa-  [from its representing the sixth power of a thousand] Alteration of hexa-  [from its representing the sixth power of a thousand]
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