单词	aircraft observer
释义	aircraft observer noun : a person holding a rating in the U.S. Air Force for any aircrew position except that of pilot Word History First Known Use 1950, in the meaning defined above
随便看	Neumünster Neuquén neur neur- neurad neural neural arch neural axis neural cavity neural crest neural fasciculus neural gland neural lamina neural network neural pathway neural plate neural shield neural tube neuraler neuralest neuralgia neuralgias neuralgic neuralgies neuralgy

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