Arcus dentalis
[医] 牙弓, 齿弓
🧩 词语组成解析
[医] 弓
🗣️ 情景例句
You do. You do. There's a book here.
当然 ，当然。书要出版。
I couldn't get through.
电话打不通。
None of us is afraid of difficulties.
我们当中没有一个人害怕困难。