名词
中文翻译：挖掘机
同义词：
['excavator', 'backhoe', 'bulldozer']
例句：
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1.The excavator was used to dig the foundation of the new building.
挖掘机被用来挖掘新建筑的基础。
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2. The backhoe is a common tool for digging holes in the ground.
反铲是一种常见的挖掘地面洞孔的工具。
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3. The bulldozer was used to level the land before the construction began.
推土机被用来在建设开始前平整土地。