词汇	up-down error
释义	up-down error 上下误差
随便看	personnel screening personnel section Personnel Section personnel security Personnel security Personnel Security Appeal Board Personnel Security Clearance Personnel Security Clearance File Personnel Security Officer Personnel Security Questionnaire Personnel Seismic Intruder Detector personnel selection Personnel Selection and Appoint Personnel Selection and Practical Measurement personnel selection and training Personnel Selection Officer Personnel Selections personnel selection training school personnel seletion Personnel Separation Center personnel service Personnel Service Branch Personnel Service Center Personnel Service Company Personnel Service Detachment