The effects of chemical warfare are very terrible, causing great harm. 化学战的后果是很可怕的，危害很大。
This chemical warfare being waged in our fields might suggest that the plants have no defences of their own against disease. 在我们的田间展开的这场化学战似乎说明植物没有自己的防御系统抵抗疾病人侵。
