unstratified structure

例句：

1. 1. The soil is unstratified, which means it's not layered like a slab of ice.
   土壤是无分层的，这意味着它不像一块冰那样分层。
2. 2.The rocks are unstratified, indicating that they were formed by the action of water.
   岩石是无分层的，这表明它们是通过水的作用形成的。
3. 3. The study found that the unstratified layers of sediment in the ocean could be used to reconstruct past climates.
   研究发现，海洋中无分层的沉积层可以用来重建过去的气候。