Cellular cementum
[医] 含细胞牙骨质
🧩 词语组成解析
n. 牙骨质, 水门汀
🗣️ 情景例句
I'm through with you!
我们之间完了。
On a crowded train, one comes in contact with many people.
在拥挤的火车里面，会和许多人接触。
Excuse me. Where's the toilet, please?
请问洗手间在哪？