Cemental gingiva
[医] 牙骨质龈
🧩 词语组成解析
a. 白垩质的
n. 齿龈
🗣️ 情景例句
whom I think you've met once or twice before.
我想你以前见过他一两次面。
I bought 7 boxes of matches.
我买了七盒火柴。
His vanity was hurt by their talking so frankly.
他们坦率的谈话伤害了他的虚荣心。