pesticide n. 杀虫剂

The pesticide was spread over the vegetable plot.
菜田里撒上了农药。

devastating adj. 毁灭性的

It is the most devastating storm in 20 years.
这是20年来破坏性最大的风暴。

mutation n. 变化; 转变; 突变; 变异

equilibrium n. 平衡, 均势

He lost his equilibrium and fell into the lake.
他失去平衡，跌进湖里。

concord n. 和谐, 一致, 和睦

These states had lived in concord for centuries.
这些国家几个世纪以来一直和睦相处。