Intrabony
骨内的
🗣️ 情景例句
What business are you in?
你从事哪一行？
What time does the first train to Boston leave?
第一班去波士顿的列车什么时间开出呢？
In the pioneering days, however, this was not the case at all.
然而，在登山运动的初期，全然不是这种情况。