例句與造句

1. Post-emergents attack weeds after they've sprouted and are most effective when applied to young weeds.
2. "Agricultural objectives include reducing needs for chemical pesticides by boosting the effectiveness of beneficial insects that attack weed and insect pests, " said R . Dean Plowman, administrator of USDA's Agricultural Research Service.
3. It's difficult to find attack weed in a sentence. 用attack weed造句挺難的