果园主人定期喷洒农药以防止害虫破坏水果。

The orchard owner sprays ___pesticides regularly to prevent pests from damaging the fruits.

农民在田地里喷洒杀虫剂来保护庄稼免受虫害。

Farmers spray ___pesticides in the fields to protect crops from insects.

农民们需要谨慎使用农药，以免对土壤和地下水造成污染。

Farmers need to use ___pesticides carefully to avoid contaminating the soil and groundwater.