单词	pit-run clay gravel
释义	pit-run clay gravel 坑粘土砾石
随便看	Civil service pension si index-link civil service performance rating act civil service post civil service promotion act civil service reform Civil Service Reform Act Civil Service Regulation Civil Service Retirement Civil Service Retirement System Civil Service Rule civil services civil-services civil service selection board civil service specialization civil service statistics civil service superannuation Civil Service Survivor Benefit Plan civil service system civil service system in France civil service training civil service training and development Civil Service Working Party civil session civil sessions civil sewage