1. The Namurian period is characterized by the deposition of coal-bearing sediments.

纳穆尔期以沉积含煤的沉积物为特征。

2. Fossils from the Namurian period provide important insights into the flora and fauna of ancient terrestrial ecosystems.

纳穆尔期的化石为研究古代陆地生态系统的植物和动物提供了重要的见解。