notknowasinglecharacter;absolutelyilliterate;一字不识
Idon'tknowhimatall.;He'saperfectstrangertome.我与他素不相识。
shownounderstandingofthetimes;不识时务
notknowhowtoappreciatefavours不识抬举
learning;knowledge;学识
foresightandsagacity;远见卓识
ShiGonghao识公浩