名词
中文翻译：挖掘机
同义词：
['excavator', 'backhoe', 'bulldozer例句：1. The construction crew used a walker excavator to dig the foundation for the new building.（施工队使用挖掘机为新建筑挖掘地基。）']
例句：
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1. The construction crew used a walker excavator to dig the foundation for the new building.
施工队使用挖掘机为新建筑挖掘地基。
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2. The bulldozer was used to level the terrain before the construction began.
在建设开始前，推土机被用来平整地形。
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3.The excavator was used to remove the debris left by the construction workers.
挖掘机被用来清除建筑工人留下的废墟。