germacrone

例句：

1. 1.The germacrone is a rare and valuable gemstone.
   这个宝石非常罕见且价值连城。
2. 2. The germacrone was discovered in the depths of the ocean.
   这个宝石是在海洋深处被发现的。
3. 3. The germacrone has been used for centuries as a symbol of wealth and power.
   这个宝石自古以来就被用作财富和权力的象征。