There have been dozens of instances since 1979, the year of the Three Mile Island accident, in which nuclear reactors have had to be shut down for more than a year for safety reasons.
自1979年发生在三哩岛的事故以来，已经有几十起事故，核反应堆因为安全原因被迫关闭一年多。
In recent years, the situation of safety in production takes a turn for the better year by year, but, serious and exceptionally serious accidents still occurred frequently in high-risk industry.
近年来，全国安全生产形势逐年好转，但高危行业重特大事故频发，给人民生命财产安全造成了难以弥补的损失。
In recent years, the situation of safety in production takes a turn for the better year by year, but, serious and exceptionally serious accidents still occurred frequently in high-risk industry.
近年来，全国安全生产形势逐年好转，但高危行业重特大事故频发，给人民生命财产安全造成了难以弥补的损失。
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