vesicular crust layer

例句：

1. 1. The study of the vesicular crust layer is crucial for understanding the formation and evolution of the Earth's crust.
   研究囊状硬壳层对于理解地球地壳的形成和演变至关重要。
2. 2.The vesicular crust layer plays a vital role in the transportation of nutrients from the soil to the plant roots.
   囊状硬壳层在营养物质从土壤传输到植物根部的过程中起着至关重要的作用。
3. 3.The vesicular crust layer is composed of calcium carbonate crystals that are embedded in the soil particles.
   囊状硬壳层由嵌入土壤颗粒中的碳酸钙晶体组成。