stepped retaining wall

例句：

1. 1.The stepped retaining wall helps to stabilize the slope.
   阶梯式挡土墙有助于稳定斜坡。
2. 2. The construction of the stepped retaining wall has been completed.
   阶梯式挡土墙的建设已经完成。
3. 3.The stepped retaining wall is designed to prevent soil erosion.
   阶梯式挡土墙的设计旨在防止土壤侵蚀。