Late Ordovician epoch

例句：

1. 1.The Ordovician epoch is considered one of the most significant geological periods in Earth's history.
   奥杜威纪期被认为是地球历史上最重要的地质时期之一。
2. 2.The discovery of fossils from the Ordovician period has shed light on the early evolution of life on Earth.
   奥杜威纪期的化石发现揭示了地球上早期生命演化的线索。
3. 3. The Ordovician epoch was characterized by the rise of multicellular organisms and the development of complex ecosystems.
   奥杜威纪期以多细胞生物的出现和复杂生态系统的发展为特征。