auger core

例句：

1. 1. The auger core is essential for breaking through the hard rock.
   钻头核心对于穿透坚硬岩石至关重要。
2. 2.The engineer used a special auger core to drill a deep hole in the rock.
   工程师使用一种特殊的钻头核心在岩石中钻出一个深洞。
3. 3.The construction crew needed to replace the worn auger core before they could continue work.
   施工队需要更换磨损的钻头核心，才能继续工作。