pest
/pɛst/
a serious (sometimes fatal) infection of rodents caused by Yersinia pestis and accidentally transmitted to humans by the bite of a flea that has bitten an infected animal
中文释义：害虫；有害生物
Farmers use pesticides to protect crops from pests and diseases.
农民使用杀虫剂保护作物免受病虫害。
Rats and cockroaches are common household pests in urban areas.
老鼠和蟑螂是城市地区常见的家庭害虫。