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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.
    更多例句
  • Now nobody can deny that life back in the Cambrian era was already extremely varied.
  • When we consider another event of the Cambrian period, an interesting parallel emerges.
  • The evidence fitted, but there was something of a gap between the first eye and the Cambrian explosion event.
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