The two sisters are so similar that it's almost impossible to tell one from the other.

这两姐妹如此相似，以至于几乎无法区分。

Sichuan dialect sounds much the same as Hubei dialect. It is sometimes difficult to tell one from the other.

四川话和湖北话在北方人听起来很相似，有时难以区别。

And sometimes it is difficult to tell one from the other, for a piece of good expository narrative can also be experiential and aesthetic with its lively and vivid tales.

有时候两者甚至难以区分，因为有的说明记叙文情节生动，也极富欣赏价值。