Sigmatism
s发音困难
🗣️ 情景例句
Well,
那么，
I hope you can pass the examinations.
我希望你的考试能通过。
' I looked down and nearly fell off the ladder when I saw a policeman.
”我向下面看去。当我看清是一个警察时，差一点儿从梯子上掉下去。