回顾往事，我们有时间自我学习。

In retrospect, we had time to educate ourselves.

我们回顾往事，会找到哪些幸福，哪些遗憾呢？

What happiness should we find in reviewing the past,what regrets?

回顾往事，我们将会发现什么快乐、什么悔恨呢？

What happiness should we find in reviewing the past , what regrets?

每一个走出一段槽糕的感情的人在回顾往事的时候，都后悔自己为什么没有早点摆脱旧情。

No one who ever gets out of a bad relationship looks back without wishing they made the move sooner.

庆祝日的首要目的，通常是回顾往事，尤其是纪念那些由于对文化生活的发展而获得了特殊荣誉的人物。

A day of celebration generally is in the first place dedicated to retrospect, especially to the memory of personages who have gained special distinction for the development of the cultural life.