pedal thresher

例句：

1. 1. The farmer used apedal thresher to cut the wheat.
   农民使用踏板式收割机割麦子。
2. 2.The pedal thresher was designed forefficient crop harvesting.
   踏板式收割机是为高效农作物收割设计的。
3. 3. The pedalthresher has becomean essential tool in modern agriculture.
   踏板式收割机已成为现代农业中不可或缺的工具。