简简单单说着他的过去哭哭笑笑想着她的回忆
[jiăn jiăn dān dān shuō zhe tā de guò qù kū kū xiào xiào xiăng zhe tā de huí yì]
A phrase indicating talking about someone else's past simply while reminiscing with mixed emotions over memories involving her. It portrays reflecting on bittersweet moments with nostalgic longing or complexity in feelings.