Sigmatism
s发音困难
🗣️ 情景例句
My instructor thought that the beginner's class was too easy for me.
老师认为初级课程对我来说太容易了。
I can recommend their pizza.
那家店的毕节饼值得推荐。
During all these tests Vera was blindfold;
在所有这些实验中，维拉的双眼都是蒙着的。