Plicadentin
放射状牙质
🗣️ 情景例句
You can say that again.
你说对了。
Repetition is the mother of knowledge.
反覆学习是知识之源。
We have just moved into a new house and I have been working hard all morning.
我们刚刚搬进一所新房子，我辛辛苦苦地干了整整一个上午。