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单词 oligocene
释义
Oligocene
nnoun.timefrom 40 million to 25 million years ago; appearance of sabertoothed cats
Synset:Oligocene Oligocene epoch
Part Holonyms:Tertiary Tertiary period
Instance Hypernyms:epoch
Inherited Hypernyms:oligoceneepochgeological timetimeattributeabstractionentity
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