Insecticide: Any of a large group of substances used to kill insects. Such substances are mainly used to control pests that infest cultivated plants and crops or to eliminate disease-carrying insects in specific areas.

• 杀虫剂:用来杀死昆虫的有毒物质。主要用于控制侵扰作物的害虫或者在特定地区消灭传染疾病的昆虫。