“挖掘机”用英语怎么说？

蓝色挖掘机看见红色的卡车在沟里.Blue Digger looked at Red Truck down in the ditch.我们需要一台挖掘机来平整土地.We need a mechanical digger to level the ground.挖掘机的主要工作就是土壤的挖掘.The main task of hydraulic excavator is to dig soil....