Tetraphthong
四合元音
🗣️ 情景例句
Scene: Tom and his wife have invited Carl and David for dinner.
场景：汤姆和他夫人邀请卡尔和大卫吃晚饭。
Have you milked the cows?
你已经挤过奶了吗？
No, this is Sam.
不，我是萨姆。