How to get a silence interval inside a sentence?

[feelins]

How could I to get a obvious silence interval inside a sentence?
I use 'sp', 'spn' 'sil', and didn't get the quite sutiable result.
As I used before, I use montreal/bin/mfa_align, that will works fine at that time.

I don't know now, I change to conda aligner, I can't get good result now.