keep blank for english asr result (#623)

zhaomingwork

2023-06-13 4a33f08defa92ac6c9c757dbde06d29d183bf203

1
2
3
4
5
6
7
8
9
i    1
ii    2
iii    3
iv    4
v    5
vi    6
vii    7
viii    8
ix    9