Pathodontia
牙病学
🗣️ 情景例句
The rural workforce has been flowing in to the cities ever since the open door policy was adopted.
自从改革开放政策实施以来，农付劳动力正不断流向城市。
In a calm sea, every man is a pilot.
平静的海上易驶船。
As there are so many people about, the dogs have to be kept in a special enclosure.
由于来人太多，狗被关在专门的围栏里。