look back (on sth.)

look back (on sth.) 回顾，回忆

【例句】

◆ As I look back on that day now, it surely lacks any sense of reality.我现在回想当天的情景时，无疑缺乏任何现实的感觉。（北京高考） 

◆ My grandpa often looked back on his childhood.我的祖父常常回顾他的童年。