Umbc
[医][=umbilical cord]脐带
🗣️ 情景例句
You must develop the muscles of your speech organs to produce unfamiliar sounds.
所以你必须训练和发展你的发音器官（声带、舌、口、鼻腔等）的肌肉，以便发出陌生的（另外一种语言）声音。
By the time we got there,the play had already begun.
等我们到那里，戏已经开始了。
You're welcome. But, please give it back soon.
不要客气。但是要及时还我。