headsill

例句：

1. 1. The headsill of the tree is a beautiful sight to behold.
   这棵树的树冠是一道美丽的风景。
2. 2.The king's headsilver crown shone brightly in the sun.
   国王的王冠在阳光下闪闪发光。
3. 3. The scientist used a microscope to examine the headsilver of the bacteria.
   科学家使用显微镜检查细菌的头部银质部分。