scontion

例句：

1. 1. 石炭纪
   地质年代
2. 2. 石炭时代
   地质时代
3. 3.石炭层
   地质学
4. 1. The discovery of ancient plantsin the Cambrian period is asignificant contribution to our understanding of Earth's history.
   在寒武纪时期发现古代植物是对我们理解地球历史的重要贡献。
5. 2.The Cambrian period is often referredto as the "age of dinosaurs," as many species ofthese prehistoric creatures were discovered duringthis time.
   寒武纪时期通常被称为“恐龙时代”，因为在这个时期发现了许多这些史前生物的物种。
6. 3. The Cambrian period is also known for itsrich fossil record, which provides valuable insightsinto the evolution of life on Earth.
   寒武纪时期也以其丰富的化石记录而闻名，这为我们提供了关于地球上生命演化的宝贵见解。