除“四害”就是指灭蝇、灭蚊、灭蚤、灭鼠,以及杀灭其他会传播疾病的昆虫。过去,除“四害”工作靠全民动员,搞人海战术,以人多力量大为主。时代在前进,科技在进步,现在用了科学技术,除“四害”就大不一样了。请看图1,你定会很好奇,这样一个大“水滴”是干什么用的呢?其实它是运用了一种很传统的方法:通 In addition to “four pests ” means to kill flies, mosquitoes, fleas, rodent control, and kill other insects that will spread the disease. In the past, in addition to “four peasants ” work by the mobilization of the people, engage in sea tactics, with more than the strength of people. The times are advancing, the progress of science and technology, now using science and technology, in addition to “four pests ” is quite different. Look at Figure 1, you will be very curious, such a big “water droplets ” is what is the use? In fact, it is the use of a very traditional way: through