1. We continually wage war on them, for they contaminate our food, carry diseases, or devour our crops.
    人类不断同昆虫斗争，因为昆虫弄脏我们的食物，传播疾病，吞噬庄稼。

2. They would devour all our crops and kill our flocks and herds,
    昆虫会吞食我们的全部庄稼，杀死我们的成群的牛羊。