This was a memorable occasion in my life.
这是我一生中值得纪念的时刻。Since liberation all its memorable sites have been restored.
解放以来,所有值得纪念的地方都已恢复了。It was a memorable experience for me.
对我来说那是一次难忘的经历。This is indeed the most memorable day of my life.
这确是我一生中最难忘的日子。