Predentin
前期牙(本)质, 原牙质
🗣️ 情景例句
How much notice of cancellation is necessary to get my deposit back?
想把定金拿回来，要提前多长时间通知你才行？
I ought to not bother him any more.
我应该不要打扰他了。
We succeeded in lighting the fire.
我们成功地点着火。