winnower

例句：

1. 2. 筛选者，风选机3.
   在农业中
2. 1. The farmerused a winnower to separate thegrain from the chaff.
   农民使用风车来分离谷物和糠皮。
3. 2. The winnower was designed to efficiently remove weeds from the fields.
   风选机被设计用来从田地中有效地去除杂草。
4. 3.The winnower is essential for maintainingclean and healthy soil in agricultural fields.
   风选机对于保持农田清洁和健康至关重要。