a poisonous chemical used for killing insects that destroy crops. It also killsanimals and is dangerous to humans, so is no longerallowed in many countries. This kind of chemical is called a pesticide or an insecticide. 滴滴涕(一种有毒化学品,用于杀死破坏农作物的害虫,但也能杀死动物,对人很危险,因此在许多国家已被禁用)