quaternary carbon atom

例句：

1. 1.The quaternary algae are found in the oceans and lakes.
   四分体藻存在于海洋和湖泊中。
2. 2.The quaternary ice sheet is a major source of fresh water for the region.
   四分体冰盖是该地区的主要淡水来源。
3. 3. The quaternary fossils provide valuable insights into the evolution of life on Earth.
   四分体化石为研究地球上生命演化提供了宝贵的信息。