Periodontics
n. 牙周病学\\n[医] 牙周病学
✅ 同义词
🗣️ 情景例句
I'd just like to repeat, do not be late!
我只想重复一遍，别迟到！
This is my friend Susan.
这位是我的朋友苏珊。
We visited the Great Wall. We went there by bus. We all took some food and drink with us.
我们参观了长城。我们是坐车去的。我们每人都自备一些食物和饮料。