look back on ，表示回首，例如：

1.Now I can look back on the whole tragedy from a distance of forty years.時(shí)隔40年后，現(xiàn)在我可以回顧整個(gè)悲劇了。

2.I can look back on things with a clear conscience. I did everything I could.我可以問(wèn)心無(wú)愧地回首過(guò)去，我已經(jīng)盡力了。

3.They can look back on their endeavours with pride.他們可以驕傲地回首過(guò)去付出的努力。