“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	railway express for less-than-carload freight railway fecal sewerage collection and discharge railway flat car railway food hygiene railway foundation treatment railway freight car railway freight transportation railway geographic information system railway goods invoice information system railway goods transportation railway goods transportation measurement and inspection railway goods yard Railway Guerrilla railway industrial siding railway infrastructure communication network railway intelligence service railway intelligent building railway intelligent dispatching command railway intelligent logistics railway intelligent transportation system railway intermodal flatcar Railway Internet Ticketing System railway ITS architecture railway labor protection railway launching vehicle

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