hydraulic sand filling

例句：

1. 1. The engineer used a hydraulic sand filling to reinforce the foundation of the building.
   工程师使用一种液压砂填充来加固建筑物的基础。
2. 2. During construction, the hydraulic sand filling was carefully poured to ensure stability.
   在施工期间，液压砂填充被小心地倒入以确保稳定性。
3. 3.The hydraulic sand filling was used as an insulator to reduce noise and improve acoustics.
   液压砂填充被用作隔音材料，以降低噪音并改善声学效果。