Plicadentin
放射状牙质
🗣️ 情景例句
I'm too deeply involved.
我已陷得太深，难以自拔了。
How long will it take you to have it fixed?
你要多少天才能把它修理好？
We know instinctively, just as beekeepers with their bees,
我们本能地懂得，就像养蜂人和他的蜜蜂那样，