bore excavator

例句：

1. 1.The construction crew used a boring excavator to level the ground for the new road.
   建筑工人使用一台挖掘机来平整新路的地面。
2. 2. The engineer was tasked with designing a new boring excavator that would improve efficiency.
   工程师被指派设计一种新型挖掘机，以提高效率。
3. 3.The old mining town has been transformed into a bustling city by the use of modern boring excavators.
   通过现代挖掘机的运用，这个古老的矿业小镇已经变成了一个繁忙的城市。