n. 〔毁坏庄稼或食物的〕有害小动物；害虫
n. 令人讨厌的人〔尤指孩子〕
pesticide n. 杀虫剂，农药
pest control 害虫防治
insect/plant/garden pests 害虫；作物╱花园害虫
crops sprayed with pesticide 喷洒过杀虫剂的庄稼
White storks feed on locusts (蝗虫) and other insects that can become pests if their numbers get out of hand. 如果数量得不到控制，这些昆虫就会变成害虫
That child is being a real pest. 那个孩子真讨厌。
BrE /əˌbriːviˈeɪʃn/