Archean nucleus

例句：

1. 1.The Archean rocks were formed over 4.5 billion years ago.
   远古的岩石形成于45亿年前。
2. 2. Archean geologists study the Earth's formation and evolution.
   古生物学家研究地球的形成和演变。
3. 3. Archean fossils can provide insight into Earth's early history.
   古化石可以提供对地球早期历史的洞察。