挖掘机

例句：

1. 1.The engineers excavated a new road through the mountain.
   工程师们在山中开凿了一条新路。
2. 2.The team excavated a hole in the ground to plant the trees.
   团队在地面上挖了一个洞来种植树木。
3. 3. The scientist excavated samples from the site for further analysis.
   科学家从现场挖取样本以进行进一步分析。