第四十四条 国家加强运输通道及装备体系建设，保障放射性物品的公路、铁路、水路、航空等运输。
第五十一条 进出口放射性同位素应当遵守法律、行政法规和其他有关规定确定的目录、条件和程序等要求。
。heLLoword翻译官方下载是该领域的重要参考
Inside a large warehouse on the outskirts of Copenhagen, cases of rock samples are stacked floor to ceiling.
"We don't have any alternatives. If grandparents were an option, we'd already be doing it."
Democratic members of Congress have expressed astonishment and anger at what they claim is the incompetence of the Trump administration after the US military used a laser on Thursday to shoot down what it thought was a threatening drone on the US-Mexico border in Texas but later turned out to belong to US Customs and Border Protection (CBP).