光阴一去不复返 Time lost can not be recalled ; Lost time is never found again

悲伤一去不复返 my sadness is gone

时间一去不复返 Time Never Goes Back

时光一去不复返 Time is gone forever

过去的将一去不复返 Past is gone forever ; Past gone forever

我一去不复返了 I'm gone ; I am gone

我的信念一去不复返 My belief is missing

那样的日子一去不复返 them times are no more

宝贵的时光一去不复返 The precious moments are all lost in the tide, yea