名词短语
中文翻译：后填土
同义词：
['reinforcement', 'backfilling例句：1. The engineer was asked to back fill the hole in the wall.（工程师被要求在墙上的洞里回填土。）']
例句：
-
1. The engineer was asked to back fill the hole in the wall.
工程师被要求在墙上的洞里回填土。
-
2.The construction crew had to back fill the area with sand and gravel.
建筑工人不得不用沙子和砾石回填那个区域。
-
3. The excavator was used to back fill the foundation of the building.
挖掘机被用来给建筑物的基础回填土。