n. space that is surrounded by something
n. soft decayed area in a tooth; progressive decay can lead to the death of a tooth
n. (anatomy) a natural hollow or sinus within the body
n. 洞, 空穴, 腔
[化] 空穴
1. The dentist found a cavity in my tooth during the check-up.
牙医在我的检查中发现了一个龋齿。
2. It's important to brush your teeth regularly to prevent cavities.
定期刷牙很重要，以防止龋齿的发生。
3. She filled the cavity with a special dental material.
她用一种特殊的牙科材料填补了那个龋齿。