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agnotozoic era; Proterozoic; Proterozoic Era | |||
Proterozoicus | |||
Agnotozoic age; Proterozoic (era) | |||
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Proterozoic | |||
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Proterozoic eon | |||
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Proterozoic | |||
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Proterozoic | |||
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proterozoic era (erathem) |
元 古 代 : 23 phrases in 5 subjects |
Earth sciences | 5 |
General | 4 |
Latin | 3 |
Oil / petroleum | 3 |
Technology | 8 |