Cementum canaliculi
[医] 牙骨质小管
🧩 词语组成解析
n. 牙骨质, 水门汀
[医]（单canaliculus）小管
🗣️ 情景例句
Why don't you write to me, Robbie,
你为什么不给我写信呢 ，Robbie，
What time do you finish your work?
你什么时候下班？
Were you in San Francisco at the time of the big earthquake in 1989?
1989年旧金山大地震时，你在那儿吗？