Cambrian是什么意思

详细释义

• 0 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 -- 寒武紀的（寒武紀，距今約5.43億至4.9億年前的地質時期，無脊椎動物開始大量出現）

  • the Cambrian period 寒武紀時期

  • Cambrian rocks 寒武紀時期的岩石