A long, long time, later。
例句:
1、很久很久以后人们还能读到刻在石头上的这些字句。
Folks will be reading these words, long after were gone.
2、很久很久以后,在一棵橡树上。
Long, long afterwards, in an oak.
3、或许,也会在很久很久以后。
Or, It will be for long.
4、也许,直到很久很久以后。
Perhaps, a long time afterward.
5、在很久很久以后,人们仍然口头相传土成造地的故事。
In the distant future, people would be telling the legendary story of Tucheng making land.