“precambrian flora”的概念、定义、翻译、参考文献-科学参考

单词	precambrian flora
释义	precambrian flora Encyclopedia 理学古植物学释 precambrian flora前寒武纪植物前寒武纪（5.4亿年以前）和早古生代是藻类植物的时代。35亿年前或略早于35亿年前到大约15亿年的前寒武纪地球上只有细菌和蓝藻。它们都是原核生物。从15亿年前到寒武纪（5.4亿年前）地球上除细菌和蓝藻外，已有绿藻、红藻和褐藻。
随便看	natural landscape natural language natural language dialogue natural language generation natural language processing natural language processing, NLP natural language processing system natural language queries natural language retrieval Natural Language Semantics natural-language spatial query natural language understanding natural language understanding, NLU natural language vocabulary natural language vs. artificial language Natural Law natural law natural law school natural levee natural lifetime natural ligands to G quadruplex natural ligands to G-quadruplex natural light natural lighting natural line-broadening

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