PFENNING A P.Madson M R.Roybal J E Simultaneous determination of chloramphenicol, florfenicol, and thiamphenicol residues in milk by gas chromatography with electron capture detection 1998(4是什么意思_PFENNING A P.Madson M R.Roybal J E Simultaneous determination of chloramphenicol, florfenicol, and thiamphenicol residues in milk by gas chromatography with electron capture detection 1998(4在线翻译_英语_读音_用法_例句