原生代 meaning in English
proterozoic
protozoic
Examples
- Global ice ages occurred at least three times in the period known as the proterozoic eon , first at 2 . 3 billion years ago and again at 750 million and 600 million years ago
原生代期间至少发生过三次全球性冰期，第一次始于23亿年前，其后于7 . 5亿与6亿年前又再度发生。 - Like the better - studied late proterozoic glaciations , the huronian event appears to have been global , based on interpretations that some of the continents were near the equator at the time ice covered them
休伦冰期的相关研究不如其后两次原生代冰期详尽，但从当时位于赤道附近的部份陆地也受冰层覆盖的情况看来，它似乎也是一场全球性事件。