single bit felling axe

例句：

1. 1. The engineer used a single-bit felling axe to cut down the tree.
   工程师用单比特砍伐斧头砍倒了那棵树。
2. 2. The old man was using a single-bit felling axe to clear the forest.
   老人正在使用单比特砍伐斧头清理森林。
3. 3. The scientist discovered a new method of cutting wood with a single-bit felling axe.
   科学家发现了一种新的方法，可以用单比特砍伐斧头切割木材。