for all one knows

• 说不定 ...
• ... 也未可知

for all one knows的用法和样例：

例句

1. I'll sit up for a time, in case I may be wanted.
   我先不睡，说不定会通知得着我。
2. For all I know she's still living in Boston.
   说不定她还住在波士顿。

1. It might have been tomato soup for all we know.
   这是番茄汤亦未可知。
2. When you are ill make haste to forgive you enemies, for you may recover.
   当你有病之际，赶快宽恕你的仇人吧，因为你可能复原也未可知。