| National Aeronautics and Space Administration |
- {NPR} agencia: Agencia espacial norteamericana (F)
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| national archives |
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| national airline |
- {N} aerolínea nacional (F)
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| national anthem |
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| national assembly |
- {N} asamblea nacional (F)
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| national bank |
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| national boundaries |
- {N} fronteras nacionales (FPL)
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| national character |
- {N} carácter nacional (M)
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| national costume |
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| national debt |
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| national defense |
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| national guard |
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| national holiday |
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| national interests |
- {N} intereses nacionales (MPL)
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| national monument |
- {N} monumento nacional (M)
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| national park |
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| national pride |
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| national security |
- {N} seguridad nacional (F)
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| national theater |
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| gross national product |
- {N} producto nacional bruto (M)
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