The story is too diffcult for us to understand

The story is too diffcult for us to understand
The story is too diffcult for us to understand

The story is too diffcult for us to understand
The story is so hard that none of us can understand it.

这个故事对我们来说太难而不能够理解

这个故事对于我们来说太难理解了。

这个故事对于我们太难了以致于不能理解