Peridentoclasia
牙周组织溃坏
🗣️ 情景例句
It's a problem, isn't it?
这确实是个问题，不是吗？
Sooner or later.
迟早会的。
Recent developments in astronomy have made it possible to detect planets in our won Milky Way and in other galaxies.
天文学方面最新发展使得我们能够在银河系和其他星系发现行星。