| 释义 |
cambrian period
释义
寒武纪：地质年代的一个时期，距今约5.4亿年前，是古生代的第一个时期，以生物多样性的爆发和无脊椎动物的出现而著名。
例句
1·During the Cambrian period , 500 million years ago, worm-like creatures were evolving into fish-like creatures.
在5亿年前的寒武纪，似蠕虫生物逐渐演化成似鱼生物。
2·The basement strata and the migmatite, however, were formed much later, about Cambrian period and early palaeozoic era.
但其基底地层和混合岩形成时代较晚，为寒武纪和下古生代。
3·Afterward, global large-scale massive volcanic activity in Permian Period generally brought about metamorphism whole middle Cambrian Period volcanic sediment rock in research area.
二叠纪全球性大规模火山活动，致使区内整个中寒武纪的火山沉积岩普遍发生变质。
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