Tā duì zìjǐ de cuòwù qīngmiáo-dànxiě, gēnběn méiyǒu dàoqiàn.
He glossed over his mistakes and didn't apologize at all.
Tips
memory
Literally 'light strokes and pale writing' - imagine a painter touching canvas so lightly that nothing is really shown. The image captures the act of barely addressing something, making it seem lighter than it is.