Lungchuan glacial stage

例句：

1. 1. The Lungchuanglacial stage is a crucial periodin the Earth's history.
   凌寒期是地球历史上一个至关重要的时期。
2. 2.The discovery of fossils from the Lungchuan glacial stage hasshed new light on our understanding of prehistoric life.
   从凌寒期发现的化石为我们了解史前生命提供了新的见解。
3. 3. The Lungchuan glacial stage was characterized by vast ice sheetsand glaciers.
   凌寒期以广阔的冰原和冰川为特征。