点金石

例句：

1. 1. The ancients believed that the point of adiamond was the key to unlocking itsfull potential.
   古人认为钻石的尖端是解锁其全部潜力的关键。
2. 2. Inthe story, the keystone is said to have beenhidden in a secret cave.
   在这个故事中，据说密钥石被隐藏在一个秘密的洞穴里。
3. 3. The discovery of thiskeystone has sparked renewed interest inthe study of crystallography.
   这一发现重新点燃了对晶体学研究的兴趣。