在过去的一百多年里,人类创造了许许多多的科技成果。这些成果不仅使世界的面貌大为改观,而且极大地改善了我们的日常生活。电话、无线电和电视的出现,使相距千山万水的人们,眨眼间就能取得联系;汽车、高速火车、超音速飞机的使用,大大缩短了空间距离;人类正在利用生物工程的研究成果来战胜过去认为的不治之症,并用于提高农作物产量。而核裂变和核辐射的发现,既给人类的发展前景带来了光明,但同时也给人类生存蒙土了一层阴影。我们每天,甚至每时每刻都在享受着这些科技成果,以至于有些熟视无睹了。那么在这里,不妨让我们回 Over the past hundred years, mankind has created many scientific and technological achievements. These achievements have not only greatly changed the world outlook, but have also greatly improved our daily lives. The advent of telephone, radio and television enabled people in remote places to get in touch in the blink of an eye; the use of cars, high-speed trains and supersonic aircraft greatly reduced the spatial distance; and human beings were using bioengineered research Overcoming past incurable diseases and increasing crop yields. However, the discovery of nuclear fission and nuclear radiation not only brought light to the development prospect of mankind, but at the same time, it also cast a shadow over human existence. We enjoy these technological achievements everyday, even every moment, so much so as to turn a blind eye. Well here, let us return