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近些年来，随着科学技术的进步和生产的发展，我省乡镇企业对放射性同位素的应用越来越广泛。然而，放射源丢失事故却时常发生。据初步统计，自１９９４年以来，乡镇企业发生的放射源丢失事故占全省事故总数的６０％以上。为分析原因，采取相应的措施，以确保放射性同位素的放?
In recent years, along with the progress of science and technology and the development of production, township and village enterprises in our province have become more and more widely used in radioisotopes. However, accidents with radioactive sources have occurred frequently. According to preliminary statistics, since 1994, the loss of radioactive sources in township enterprises accounted for over 60% of the total number of accidents in the whole province. To analyze the reasons, take appropriate measures to ensure the release of radioactive isotopes?