Cemental decay
[医] 牙骨质腐蚀
🧩 词语组成解析
a. 白垩质的
🗣️ 情景例句
Frankly, neither was I.
坦白的说 ，我当年也不好。
Do you have a book?
你有一本书吗？
A cat's ability to survive falls is based on fact.
猫在跌落时能够大难不死是有事实作为依据的。