material returning slip

例句：

1. 1. The engineer used a material backfill slip to fill the gap between the two walls.
   工程师使用一种材料回填滑块来填充两个墙之间的空隙。
2. 2.During construction, it's important to ensure that the material backfill slip is properly compacted.
   在施工过程中，确保材料回填滑块得到适当压实是很重要的。
3. 3. The material backfill slip was designed to minimize the risk of soil movement during excavation.
   材料回填滑块的设计旨在最小化开挖过程中土壤移动的风险。