笑里藏刀的英语:hide a dagger in a smile -- with murderous intent behind one's smiles; a murderous heart under a smiling exterior; a smile of treachery; cherish [nourish; warm] a serpent [snake; viper] in...
笑里藏刀的法语:cacher un poignard derrière son sourire;dissimuler des intentions criminelles derrière ses sourires