Sigmatism
s发音困难
🗣️ 情景例句
Is this your very first advanced aerobics class?
这是你第一次上有氧运动高级班吗？
When Anna crushed the herbs, the air smelled sweet.
当安娜把香草压碎时，空气里飘荡着甜香。
I'm cleaning the house.
我在打扫房间。