Cemental fibers
[医] 牙骨质纤维
🧩 词语组成解析
a. 白垩质的
n. 纤维（fiber的复数）
🗣️ 情景例句
I decided to give full-time attention to raising Robbie.
我决定全力抚育他。
Good counsel does no harm.
忠言无害。
and then there are three thousand million other Milky Ways, or galaxies, in the universe.
况且在宇宙中还有30亿个天河，即银河系。