d.f.缩写的意思

vd SB BM EMMA GLC gz PWP AD OPC QSAR ABL cemf SNAP RP RR ESP bm MASS AF SP BL QB ik NNN DEM ALC LDMI AO MA AG SL HM HC CIM NP CAEA CFSE TCM RNN CAL ZEEP SDFG PME HM AJ BP DCC K det ASTRA X. LCD SS NTP DIFAR WVD BSE SURFRR ACP APL