1. " The mud has been backfilled to the problematic area, " Xu said yesterday.
2. backfilled在线翻译
2. Up to 58 million cubic meters of soil and stone were backfilled, with the largest backfill depth at 123 meters.
3. backfilled
3. The Sailing Center seaside area shows complicated geological composition of both natural rock soil and backfilled earth of high permeability containing crushed stones and ballast.