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二疊紀
Èrdiéjì
Permian (geological period 292-250m years ago)
二疊紀
Èrdié Jì
  1. (geology) the Permian period (part of the Paleozoic era, spanning from 298.9 to 252.17 million years ago)
  2. the Permian period (part of the Paleozoic era, spanning from 298.9 to 252.17 million years ago)
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