https://www.youtube.com/shorts/k5zl0D-Vy_g 

悲苦戚壮的南朝鲜歌声或许是它今天送给我的礼物我一直在听，听了不

知多少遍了(2012年在南朝鲜给我15分钟演讲的世界数学家大会):   

If We Ride a Time Machine 

(31 years for me)

The sorrowful yet stirring songs from South Korea may well be the gift bestowed upon me today; I have been listening to them—countless times over:   https://www.youtube.com/shorts/k5zl0D-Vy_g  

这时我的泪水终于充满了眼眶。At this moment, tears finally welled up in my eyes.