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| A New Battleground? | |
| 摘 要： | U.S.President Donald Trump signed the National Defense Authorization Act into law on December 20,2019,paving the way for a U.S.Space Force. |
| 关 键 词： | U.S. PEACE LAW |
| 本文献已被 维普 等数据库收录！ | |
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