在夏天的晚上,我们能看到一盏盏幽绿色的“小灯笼”——萤火虫。萤火虫为什么能发光呢?萤火虫的尾部有发光器官,这个发光器官由发光细胞、反射层细胞、小神经与小气管等组成。如果将发光器官比作汽车的车灯,发光细胞就是会发光的灯泡,反射层细胞就是能将光集中的灯罩,小神经与小气管好比是电线与开关。 In the summer evening, we can see a quiet green “little lantern” - fireflies. Why does the firefly shine? The firefly has a luminous organ at the tail, which is composed of glowing cells, reflex cells, small nerves and small airways. If the light-emitting organs is likened to a car's headlights, a glowing cell is a glowing bulb. The reflective cell is a lampshade that concentrates the light. The small nerves and the trachea are like wires and switches.