Time or opportunity lost will return no more.机不可失,时不再来.lost?function

（that have been) lost

您的问题很简单。呵呵。百度知道很高兴帮助您解决您提出的问题。
原句： Time or opportunity lost will return no more.
翻译： 时间或机会失去不会再来。/机不可失,时不再来.

Time or opportunity has been lost will return no more

机不可失、时不再来:
Don't let slip an opportunity; it may never come again.; Don't lose a golden opportunity; it is never found again!; opportunity knocks but once.; Such an opportunity, once missed, will be forever gone.
百度知道永远给您最专业的英语翻译。

lost 形容词，作定语，修饰前面的名词，译为：失去的...
如，time lost,失去的时机
opportunity lost 失去的机会

cv

完整的句子是Time or opportunity which/ that is lost will return no more,补全的是一个定语从句,修饰前面的time or opportunity,省略后剩下的lost可以看作是把动词的过去分词后置作定语.