填空题 English into Chinese Translation．(外交学院2007研，考试科目：翻译)The new environmental health problems are multiple-created by radiation in all its forms, born of the never-ending stream of chemicals of which pesticides are a part, chemicals now pervading the world in which we live, acting upon us directly and indirectly, separately and collectively. Their presence casts a shadow that is no less ominous because it is formless and obscure, no less frightening because it is simply impossible to predict the effects of lifetime exposure to chemical and physical agents that are not part of the biological experience of man." We all live under the haunting fear that something may corrupt the environment to the point where man joins the dinosaurs as an obsolete form of life, "says Dr. David Price of the United States Public Health Service. "And what makes these thoughts all the more disturbing is the knowledge that our fate could perhaps be sealed twenty or more years before the development of symptoms. "Where do pesticides fit into the picture of environmental disease? We have seen that they now contaminate soil, water and food, that they have the power to make our streams Ashless and our gardens and woodlands silent and birdless. Man, however, much he may like to pretend the contrary, is part of nature. Can he escape a pollution that is now so thoroughly distributed throughout our world?We know that even single exposures to these chemicals, if the amount is large enough, can precipitate acute poisoning. But this is not the major problem. The sudden illness or death of farmers, spraymen, pilots, and others exposed to appreciable quantities of pesticides are tragic and should not occur. For the population as a whole, we must be more concerned with the delayed effects of absorbing small amounts of the pesticides that invisibly contaminate our world.Responsible public health officials have pointed out that the biological effects of chemicals are cumulative over long periods of time, and that are hazard to the individual may depend on the sum of the exposures received throughout his lifetime. For these very reasons the danger is easily ignored. It is human nature to shrug off what may seem to us a vague threat of future disaster. " Men are naturally most impressed by diseases which have obvious manifestations, "says a wise physician, Dr. Rene Dubos, yet some of their worst enemies creep on them unobtrusively.