地球上有的树很奇特,值得我们去探求它们的秘密。非洲的唱歌树在非洲,有一种柳树,每当微风吹过,下垂的枝条互相碰击,会发出像琴或唱歌的声音。原来,它的叶子细密坚硬,像陶瓷或金属片。难怪风一吹,柳树就“唱歌”了。卢旺达的笑树在非洲卢旺达有一种树,能发出像人一样的“哈哈” Some trees on the earth are strange, it is worth us to explore their secrets. African singing tree In Africa, there is a kind of willow, every time the breeze blowing, drooping branches hitting each other, will issue a sound like a piano or singing. It turned out that its leaves were fine and hard, like ceramic or metal pieces. No wonder the wind blows, willow “singing.” Laughing trees in Rwanda have a tree in Rwanda in Africa that emits the same “haha”