帮忙翻译一段话 －译成英文

reflect on the past
in retrospect of the past
look backward and review the past

Reflect on some of the previous thing

consider the things in the past.
consider思考，反思.
the things in the past过去的一些事情.

turn over to think previous things

reconsider some things in the past.

reflect on some previous thing
reflect on some thing happened in the past