蝉翼之円
1、挖掘机[wā jué jī]的英语是excavator; digger; clamshell shovel。挖掘机，又称挖掘机械（excavating machinery），又称挖土机，是用铲斗挖掘高于或低于承机面的物料，并装入运输车辆或卸至堆料场的土方机械。挖掘机挖掘的物料主要是土壤、煤、泥沙以及经过预松后的土壤和岩石。 2、双语例句：这些工人在操作隧道挖掘机时被大量的落石困住了。A massive rock fall trapped the men as they operated a tunnelling machine
tianyaguke1968
excavator 英 [ˈekskəveɪtə(r)] 美 [ˈɛkskəˌvetɚ] n. 挖掘机;开凿者，发掘者可以参考维基百科：Excavators (hydraulic) are heavy construction equipment consisting of a boom, dipper (or stick), bucket and cab on a rotating platform known as the "house".[1] The house sits atop an undercarriage with tracks or wheels. They are a natural progression from the steam shovels and often mistakenly called power shovels. All movement and functions of a hydraulic excavator are accomplished through the use of hydraulic fluid, with hydraulic cylinders and hydraulic motors.[2] Due to the linear actuation of hydraulic cylinders, their mode of operation is fundamentally different from cable-operated excavators which use winches and steel ropes to accomplish the movements.[3]
