Farmers thresh grain with threshing machines.是什么意思？

Farmers thresh grain with threshing machines.

农民用脱粒机脱粒.

farmers

n. 农场主，农民( farmer的名词复数 )；

例句
Thousands of farmers from across Europe have held a huge demonstration in the centre of Brussels...
来自欧洲各地的数千农民在布鲁塞尔市中心举行了大规模的示威游行。

thresh

vt.& vi. 打（麦等），脱粒，反复地做，推敲；n. 打谷；

例句
Farmers thresh grain with threshing machines.
农民用脱粒机脱粒.

grain

n. 谷物，粮食，（沙，金，盐等的）颗粒，谷粒，籽粒，（木材，大理石等的）纹理；vt. 把…作成细粒，把…漆[画]成木纹，染透，刮去（皮上的）毛；vi. 成谷粒；

例句
The six food groups include grain products, vegetables, fruits, milk and milk products, meats and meat alternates, and a miscellaneous group.
这6类食物包括谷类产品、蔬菜、水果、牛奶和奶制品、肉类和肉类替代品以及杂类食品。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

threshing

n. 打谷，脱粒；v. 打（麦等）( thresh的现在分词 )，脱粒，反复地做，推敲；

例句
After Covar Leining through struggles, exchanges the soft embryo to be taken to the threshing ground.
科瓦莱宁经过一番挣扎后换上软胎登场.

machines

n. 机器( machine的名词复数 )，机械装置，机动车辆，飞机；

例句
...13 year-olds spending their pocket money on fruit machines in arcades.
将零花钱花在游戏机室中水果盘老虎机上的13岁的少年们