fill pit operation

例句：

1. 1. The company decided to fill the pit in the ground with concrete.
   公司决定用混凝土填平地面上的坑。
2. 2.During the construction, they filled the pits and dug trenches for the foundation.
   施工期间，他们填平了坑洼并挖掘了地基。
3. 3. The engineers were tasked with the responsibility of filling the pits and ensuring safety during the excavation process.
   工程师们被指派负责填平坑洼并在挖掘过程中确保安全的责任。