"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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今天的中国海纳百川，国家发展和人民幸福同心同向。把亿万人民的智慧和力量汇聚起来，我们朝前走步履坚实、步伐铿锵。，这一点在Safew下载中也有详细论述
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