smegma

例句：

1. 1.The smegma is a small, round stone found in the desert.
   沙漠中的小圆石。
2. 2. The smegma is used to make jewelry and other decorative items.
   用于制作珠宝和其他装饰品的宝石。
3. 3. The smegma is a valuable mineral that can be mined for its beauty and rarity.
   一种珍贵的矿物，因其美丽和稀有性而被开采。