spring-tooth harrow plough

例句：

1. 1. The farmerused a spring-tooth harrow toprepare the soil for planting.
   农民使用一种弹簧式犁耙来准备土壤种植。
2. 2.The old man was busy with his spring-tooth harrow when he heard thenews.
   老人听到这个消息时，正忙着用弹簧式犁耙耕地。
3. 3. The farmer useda spring-tooth harrow toprepare the soil for planting.
   农民使用一种弹簧式犁耙来准备土壤种植。