癌症是现代科学难题 ,医学的疑难大症。近百年来 ,人类为解除癌症对生命健康日益严重的威胁 ,付出了巨大的努力 ,并且随着现代科学技术的飞速发展 ,取得了一系列令人瞩目的成就。但是 ,直到 2 0世纪结束 ,癌症仍然是个痼疾 ,它的谜底还远远没有揭开。值此新世纪之初 ,人们从已 Cancer is a difficult problem in modern science. In the past 100 years, humans have devoted enormous efforts to lifting the growing threat of cancer to life and health, and with the rapid development of modern science and technology, a series of remarkable achievements have been made. However, until the end of the 20th century, cancer is still a chronic illness, and its mystery is still far from being revealed. At the beginning of this new century, people have already