doc·tri·naire /ˌdɑktrəˈnær, ˈnɛr/
 空論家,純理論家(a.)空論的,純理派的


 Doc·tri·naire n.  One who would apply to political or other practical concerns the abstract doctrines or the theories of his own philosophical system; a propounder of a new set of opinions; a dogmatic theorist. Used also adjectively; as, doctrinaire notions.
 Note: ☞ In french history, the Doctrinaires were a constitutionalist party which originated after the restoration of the Bourbons, and represented the interests of liberalism and progress. After the Revolution of July, 1830, when they came into power, they assumed a conservative position in antagonism with the republicans and radicals.

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 doctrinaire
      adj : stubbornly insistent on theory without regard for
            practicality or suitability
      n : a stubborn person of arbitrary or arrogant opinions [syn: dogmatist]