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能知天下事打一动物
更新时间: 2020-06-30 00:00:00  

蝉的别名又叫知了。即可意译为知道、晓得。故而,能知天下事打一动物即为蝉。

蝉肚皮上的两个小圆片叫音盖,音盖内侧有一层透明的薄膜,这层膜叫瓣膜,蝉鸣是瓣膜发出的声音,人们用扩音器来扩大自己的声音,音盖就相当于蝉的扩音器一样,来回收缩扩大声音,就会发出"知——了,知——了"的叫声,会叫的是雄蝉,雌蝉的肚皮上没有音盖和瓣膜,所以雌蝉不会叫。因而蝉的别名又叫知了。

关键词: 天下 动物

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