初步: initial, preliminary, tentative...
犯: to violate, to offend, to assault, criminal, crime, to make a mistake, recurrence (of mistake or sth bad)...
空闲: idle, free time, leisure, unused (place)...
实际: reality, practice, practical, realistic, real, actual...
军人: serviceman, soldier, military personnel...
挂失: to report the loss of something...
观测: to observe, to survey, observation (scientific etc)...
纯朴: simple and honest, unsophisticated, guileless...
路过: to pass by or through...
徒步: to be on foot...
