蝉为昆虫,种类很多,雄蝉腹部有发音器,能连续不断地发出尖锐的声音。蝉的幼虫栖息在土里,它吃东西是依靠针状口器刺进树枝里,吸取汁液来维持生命。当幼虫变为成虫时,便蜕掉蝉壳,躯体在原来基础上得以延伸,故称为“蝉联”。例如某个体育项目连续保持冠军,就叫“蝉联冠军”。 Cicadas are insects, many species, male cicada abdominals have a sound device, can be issued a continuous sound sharp. Cicada’s larvae inhabit the earth and eat it by piercing the branches with needles and drawing juice to sustain life. When the larvae become adults, they slough cicada shell, the body can be extended on the basis of the original, it is called “reelection.” For example, a sports event to maintain the championship, called “won the championship.”