挖掘机正在搬运石子。

The ___excavator is moving gravel.

这位考古学家是一位经验丰富的发掘者，曾发现过许多古代文物。

The archaeologist is a skilled ___excavator who has uncovered many ancient relics.

工人们用挖掘机清理工地上的泥土。

The workers used an ___excavator to remove the dirt from the construction site.