root cutter knife

例句：

1. 1. This tool is perfect for cutting through tough roots.
   这把工具非常适合切断坚硬的根。
2. 2.The gardener used a root cutter to dig up the old tree.
   园丁用根切器挖出了那棵老树。
3. 3.The farmer needed a root cutter to clear the field of weeds.
   农民需要一把根切器来清除田地里的杂草。