talk in generalities;speak in general terms; talk superficially ? 這個(gè)問(wèn)題你不能～，而要詳細(xì)敘述。You should not talk superficially about this question. Instead you should go into details.
泛泛而談fàn fàn ér tán
籠統(tǒng)地談?wù)?。talk in generalities, speak in general terms