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precambrian

/priːˈkæm.bri.ən/

翻译: 前寒武纪,指从地球形成约46亿年前到寒武纪开始约5.41亿年前的地质时间,包括冥古宙、太古宙和元古宙。

1 个条目

noun

/priːˈkæm.bri.ən/C2formalscientific
  • zh前寒武纪,指从地球形成约46亿年前到寒武纪开始约5.41亿年前的地质时间,包括冥古宙、太古宙和元古宙。

A proper noun referring to the geological eon that spans from the formation of the Earth around 4.6 billion years ago to the beginning of the Cambrian Period, about 541 million years ago, encompassing the Hadean, Archean, and Proterozoic eons.

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  1. Geological eonC2formalscientific

    The eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago.

    zh前寒武纪

    • The Precambrian covers roughly 88% of Earth's history.
    • Fossils from the Precambrian are extremely rare.
    • The atmosphere during the Precambrian was very different from today.
词形
  • precambrians plural form
  • precambrians' possessive plural form
  • precambrian's possessive singular form