diff --git a/paddlespeech/t2s/frontend/phonectic.py b/paddlespeech/t2s/frontend/phonectic.py
index a9d04f3e775fe6970ab120ce3c903bfb84ad0dd6..b55c5b5c275c366d4a3e91f2e28330866ddf1460 100644
--- a/paddlespeech/t2s/frontend/phonectic.py
+++ b/paddlespeech/t2s/frontend/phonectic.py
@@ -99,8 +99,6 @@ class English(Phonetics):
                 if (phn in self.vocab_phones and phn not in self.punc) else "sp"
                 for phn in phones
             ]
-            # when sentences have double punctuations in the end, like "!\"",or "?\"", will get null list like []
-            # add a condition to filter it 
             if len(phones) != 0:
                 # replace unk phone with sp
                 phones_list.append(phones)