underwater rock drill

例句：

1. 1. Theengineers used a submersible drillto bore through the solid rock.
   工程师们使用了一个潜水钻来穿透坚硬的岩石。
2. 2. The underwater rock drill was essentialfor the construction of the new bridge.
   水下钻探机对于新桥梁的建设至关重要。
3. 3.The drilling process is complex and requiresskilled operators to ensure safe and efficient drilling.
   钻井过程复杂，需要熟练的操作员以确保安全高效地钻井。