Plicadentin
放射状牙质
🗣️ 情景例句
Come in, come in. Please, come in.
请进， 请进。请进来。
A scientist has come up with a good idea. That's it!
科学家想起了一个好创意。就是这个！
This is our common desire.
这是我们的共同愿望。