pest

1. N-COUNT Pests are insects or small animals that damage crops or food supplies. 害虫; 有害的小动物

...crops which are resistant to some of the major insect pests and diseases. …能抵抗一些主要病虫害的庄稼。

Each year ten percent of the crop is lost to a pest called corn rootworm. 每年有10%的作物受损于一种叫做玉米根虫的害虫。

2. N-COUNT You can describe someone, especially a child, as a pest if they keep bothering you. 讨厌鬼 (尤指小孩)[非正式]

He climbed on the table, pulled my hair, and was generally a pest. 他爬上桌子，揪我的头发，真是个讨厌鬼。