Sigmatism
s发音困难
🗣️ 情景例句
Hello, Air China Flight Reservations. May I help you?
喂，你好，中国航空公司订票处，需要帮忙吗？
The dumped products
大批的垃圾
Come and meet our employees, Mr.Richards.
来见见我们的雇员，理查兹先生。