合理使用农药英文

Pesticide：农药。它到底是可数还是不可数名词，看一下这篇短文就知道了。以下是摘自美国EPA官方网站上的文字：Are some pesticides safer than others? Biologically-based pesticides, such as pheromones and microbial pesticides, are becoming increasingly popular and often are safer than traditional chemical pesticides. In addition, EPA is registering reduced-risk conventional pesticides in increasing numbers.http://文中的pesticide加了“s”,可见它是可数名词。