“pre-Lopingian crisis”的概念、定义、翻译、参考文献-科学参考

单词	pre-Lopingian crisis
释义	pre-Lopingian crisis Encyclopedia 理学前乐平世事件释 pre-Lopingian crisis;end-Guadalupian extinction前乐平世事件发生在二叠纪晚期约2.6亿年以前的生物灭绝事件。又称瓜达鲁普世末灭绝事件。
随便看	quadratic reciprocity quadratic reciprocity law quadratic reciprocity theorem quadratic recurrence equation quadratic representation quadratic residue quadratic residue modulo m quadratic residue symbol quadratic residue theorem quadratic risk quadratic root quadratics quadratic sieve quadratic sine quadratic smoothing quadratic solitons quadratic space quadratic space of a quiver quadratic square quadratic stability quadratic stabilizability quadratic stabilization control quadratic Stark effect quadratic sum quadratic surd

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