1. It acts like slow poison.
    它有慢性毒药的作用。

2. Was converted into a poison that defies analysis even today.
    演变成了今天仍无法分析清楚的毒液。

3. In the conversion of saliva into poison, one might suppose that a fixed process took place.
    人们可能认为，唾液转变成毒液，其中有固定的程序。

4. It is said that the nerve poison is the more primitive of the two,
    据说，神经毒液在两种毒液中是较为原始的一种，

5. If water contains poisons and chemicals, it is poison.
    如果水里含有有毒物质和化学物质，水就成了毒物。

6. Farmers add fertilizer to the soil to make plants grow better, or spray poison to kill plant pests.
    农民为了使作物长得更好而给土壤施化肥或者为了杀死害虫而喷撒农药.