人为什么会衰老?这是人们长期以来一直在探求的秘密。自古以来人类就在根据各种自然现象提出有关人类衰老起因的种种假说,试图阐明衰老的机制。随着现代科学的发展,近年来在衰老起因研究方面,取得了较大的进展,提出了一些新的学说。但是当前每一学说还只能说明衰老的某一方面,只有把这些学说综合起来,才能反映老化现象的全貌。尽管如此,直至目前为止,有关衰老机制尚未完全弄清。 Why do people age? This is a secret that people have been searching for for a long time. Since ancient times, human beings have put forward various hypotheses about the causes of human aging based on various natural phenomena in an attempt to elucidate the mechanism of aging. With the development of modern science, great progress has been made in the study of the causes of aging in recent years, and some new theories have been proposed. However, each current doctrine can only show a certain aspect of aging. Only by combining these doctrines can we reflect the overall picture of aging. Nevertheless, until now, the aging mechanism has not been fully understood.