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	lantums lanuginous lanuginousnesses lanugo lanugos Lanuvian lanx lanyard lanyard knot lanyards Lanzhou lanzhous lanzknechts lanzon lanzones Lanús Lao Lao-tzu laocoa laocoons Laocoön laodah Laodicea laodicea Laodicean

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