As they went around, they stepped carefully over the tumbling rod, which was tumbling over and over on the ground.

他们绕着走，小心翼翼地跨过那根在地上翻来覆去的翻滚棒。

As they went around, 224 they stepped carefully over the tumbling rod, which was tumbling over and over on the ground.

当他们绕过去的时候，224他们小心翼翼地跨过在地上翻来覆去的翻滚杆。

Their pulling made the tumbling rod keep rolling over, and the rod moved the machinery of the separator, which stood beside the stack of wheat.

他们的拉动使翻滚的杆子不停地翻滚，杆子带动了站在麦堆旁边的分离机的机械装置。

Afterward Laura and Mary asked questions, and Pa told them that the big machine was called the separator, and the rod was called the tumbling rod, and the little machine was called the horsepower.

后来劳拉和玛丽发问，爸爸告诉她们， 大机器叫分离器， 杆子叫翻滚杆，小机器叫马力。

223 Afterward Laura and Mary asked questions, and Pa told them that the big machine was called the separator, and the rod was called the tumbling rod, and the little machine was called the horsepower.

223 后来劳拉和玛丽提出问题，爸爸告诉他们，大的机器叫分离器，杆子叫翻滚杆，小机器叫马力。