digger dredger

例句：

1. 1. The digger was used to excavate the land for construction.
   挖掘机被用来为建设挖掘土地。
2. 2.The digger has a powerful engine and can handle heavy loads.
   挖掘机有强大的引擎，可以处理重负载。
3. 3. The digger is essential for clearing away the debris from the construction site.
   挖掘机对于清理建筑工地的碎片至关重要。