在自然界里,人只是一种动物,充其量只是一种“高级动物”。人类与其它动物一样,为了生存,必须觅食,也必须避敌;为了繁衍下去,还必须“择偶”。在长期的实践中,眼睛和耳朵成为人类获取信息最重要的器官,现代科学对于光、声的研究,几乎可以满意地解释一切现象,光学、声 In nature, man is just an animal, at best, only a “senior animal.” Like other animals, human beings must foraging for food and must avoid enemies. In order to survive, humans must also be “spouse”. In the long-term practice, the eyes and ears become the most important organ for human to obtain information. Modern science can almost satisfactorily explain all phenomena, optics and sound