单词	贯时性调查
释义	同贯时性调查--追踪调查
随便看	production efficiency production engineer production engineering production eng.research asso. coding system{=pera coding system} production equipment production externalities production facilities and engineering production factor production family production file manager production file manager，pfm production final cumulative production flow analysis production flow analysis (pfa) production force production format production foundry production frequency production function production gain production--gain production gang production goods production graph production hour