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.
