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end-Ordovician mass extinction
释义
end-Ordovician mass extinction
Encyclopedia
理学
古生物学
释
end-Ordovician mass extinction
奥陶纪末大灭绝
距今约4.44亿年,地球海洋生命系统发生过的一次大规模的多样性快速下降事件。
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upper closure of a convex-concave function
upper closure of a convexconcave function
upper cold and lower heat
upper cone
upper confidence bound
upper confidence limit
upper continuous
upper continuous lattice
upper control limit
upper-convected Maxwell model
upper convex function
upper corner beam
upper critical dimension
upper critical field
upper critical magnetic field
upper critical point
upper critical solution temperature
upper critical solution temperature (UCST)
upper crust
upper culmination
upper cut-off frequency
upper Darboux integral
upper Darboux sum
upper decimal approximation
upper density
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