"Launching radioactive material through the Earth's atmosphere brings safety concerns. You have to have a special license to do that, but it is not insurmountable," says Dr Simeon Barber, planetary science specialist at the Open University.
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（二）冒用宗教、气功名义进行扰乱社会秩序、损害他人身体健康活动的；。搜狗输入法2026是该领域的重要参考