Predentin
前期牙(本)质, 原牙质
🗣️ 情景例句
We'd wait until dark and make a fire,
我们等到天黑就升火，
I asked him to do it for me, but he wouldn't.
我请他帮我做，但是他不肯。
He sent yet another fax informing the journalist that if he did not reply soon he would be fired.
于是他又发了一份传真，通知那位记者说，若再不迅速答复，将被解雇。