unhardened concrete

例句：

1. 1. The construction crew was working on the unhardened concrete foundation of the new building.
   建筑工人正在新大楼未硬化的混凝土地基上工作。
2. 2.The engineers were concerned about the quality of the unhardened concrete used in the project.
   工程师们对项目中使用的未硬化混凝土的质量感到担忧。
3. 3. The contractor had to replace the unhardened concrete slabs that were damaged during the construction.
   承包商不得不更换在施工过程中损坏的未硬化混凝土板。