sickle knife

例句：

1. 1.She used a sickle knife to cut the grass.
   她用镰刀割草。
2. 2.The farmer used a sickle knife to harvest the wheat.
   农民用镰刀收割小麦。
3. 3.The old man used a sickle knife to carve the pumpkin.
   老人用镰刀雕刻南瓜。