词汇 | Cambrian |
释义 | Cambrian adjective uk/ˈkæm.bri.ən/ us/ˈkæm.bri.ən/ (TIME) geology specialized寒武纪的(寒武纪,距今约5.43亿至4.9亿年前的地质时期,无脊椎动物开始大量出现。) from or referring to the period of time between about 543 and 490 million years ago, in which many different types of invertebrates (= animals with no back bone) first appeared These rocks date from the middle of the Cambrian era. They are already present in early Cambrian rocks.
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