如果用who he is又用老逸的词， 可以这样：

来源: 于 2011-10-10 20:52:23 [旧帖] [给我悄悄话] 本文已被阅读：次

it's just like you made an acquaintance long ago and you can't make out who he is after years of separation.

or

it's just like you made an acquaintance long ago and you can't recognize him after years of separation

etc...