Cemental decay
[医] 牙骨质腐蚀
🧩 词语组成解析
a. 白垩质的
🗣️ 情景例句
His studies advanced steadily.
他的学业不断进步。
He that is master of himself will soon be master of others.
能主宰自己的人不久就可以主宰别人。
Some of them were as big as marbles.
有的钻石像玻璃球那么大。