判若黑白

词典解释

1. 判若黑白 (pànruòhēibái)

   1. 像黑的与白的那样明显区分。形容界限分明 the difference is as between the black and the white
      • 夫文之高下雅俗,判若黑白。——清· 方望溪《书祭裴太常文后》