core mud

例句：

1. 1. The core mud is the foundation of the building's structure.
   核心泥是建筑物结构的基础。
2. 2. The engineer used core mud to test the strength of the foundation.
   工程师使用核心泥来测试地基的强度。
3. 3.The construction crew was working on removing the core mud from the basement.
   施工队正在地下室工作，清除核心泥。