Noun:

1. an excavator whose shovel bucket is attached to a hinged boom and is drawn backward to move earth

Backa巴卡backn.后面；背脊；靠背；后背；后卫vt.支持；后退adv.向后地adj.向后的；后面的；偏远的；过时的；积欠的back guy支撑back pay欠薪,欠付工资Backstad巴克斯塔德backrung后横档backfieldn.后卫外野手.back kickn.回转back lobe后波瓣,后瓣back drop跌落井,背景back iron背铁back bird托举仰平衡

1. A machine, such as a bulldozer or backhoe, that is used for digging or pushing earth.
   推土机一种可用来挖掘或推动泥土机器，如推土机或挖土机