晴蜒是一种很有趣的昆虫。每当夏秋的雨前雨后,人们常常看到它们成群结队掠空而过,犹如战斗机编队飞行一样。蜻蜓又是著名的捕虫能手,一只蜻蜒一生中能为人类捕捉成千上万只害虫。蜻蜓为什么有这么大的本领?主要靠它的两大特长:一是看得准;二是飞得快。蜻蜒有一副世界上最大的“千里眼”。每只眼由2.8万只左右小眼排列组 Chrysalis is a very interesting insect. Every time after the rain in summer and autumn, people often see them swarming in and out in groups, as if the fighter planes fly in formation. The dragonfly is also a famous insect killer. A dragonfly can capture thousands of pests for humans during her lifetime. Why do you have such a big skill? It depends mainly on its two major strengths: First, it is accurate; second, it flies faster. There is one of the world’s largest “telescope”. Each eye is arranged by about 28,000 small and small eyes