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为了战胜疾病,首先要搞清人们生病的原因。人体为什么会生病?这个问题长期困惑着人们,各种各样的猜测在民间传诵:人体生病是中了“阿波罗”的箭;是上帝对有罪孽者的惩罚;是某种鬼怪钻进人体内作祟等。很多人曾经对这些传说深信不疑,害病时就向泥塑的神象虔诚祷告。那时的医生对疾病的原因也感到迷惑不解,只好使用民间流传下来的验方盲目地治疗。医学的发展逐渐找到了科学的答案。法国化学家路易斯·巴斯德(Louis Pasteur,1822～1895)丝毫不理睬那些奇谈怪论,也不满足种种关于疾病原因的笼统猜测。他从葡萄酒变酸、蚕病、鸡霍乱和炭疽病的研究中发现某些微生物可能是引起传染病的罪魁祸首。
In order to overcome the disease, we must first find out why people are sick. Why does the human body get sick? This problem puzzles people for a long time. Various kinds of speculation are passed on in folk. The human body is sick and the arrow of “Apollo” is the punishment of God against sinful people. Into the body at work and so on. Many people have been convinced of these legends, and prayed prayerfully to the idol of clay when they were sick. At that time, the doctors were also puzzled about the causes of the disease and had to blindly treat them with prescriptions passed down by the people. The development of medicine gradually found a scientific answer. The French chemist Louis Pasteur (1822-1895) ignored all the odd arguments and did not satisfy all the general speculations about the cause of the disease. From studies on souring, silkworm, chicken cholera and anthrax, he found that certain microbes could be the culprit responsible for infectious diseases.