Marine sand is formed over thousands of years of erosion.

海沙是经过几千年的侵蚀形成的。

Due to environmental concerns over contaminated soil and increased shortages of materials like marine sand, the land will be built with a process known as deep cement mixing.

由于对受污染土壤的环境问题以及海砂等材料日益短缺，这片土地将采用一种称为深层水泥搅拌的工艺建造。