crown block

例句：

1. 1. The doctor removed the crown block to remove the tooth.
   医生移除了冠状块以去除牙齿。
2. 2. The crown block was used as a decorative element on the cake.
   冠状块被用作蛋糕上的装饰元素。
3. 3. The crown block was designed to protect the delicate structure of the flower.
   冠状块的设计旨在保护花朵脆弱的结构。