蝉,在我的老家被称作知了。多年后我才从小百科知识中知道,作为昆虫类的蝉,其种类很多。雄的发出尖锐的声音,雌的则不发声,但在腹部有听音器。幼虫生活在土里,吸食植物的根汁;成虫后吸食植物的汁。当我从理论上知道这点蝉的知识时,我已经离蝉鸣的老家很远,但在 Cicada, known at my hometown. Years later, I learned from the knowledge of a small encyclopedia, as a kind of insects, cicada, many kinds. The male made a sharp sound, while the female did not make a sound, but there was a listening device in the abdomen. The larvae live in the soil, inhaling the root juice of the plant; adults drink the juice of the plant. When I knew this theoretically the knowledge of this cicada, I was already far from the cicada’s hometown, but at