钌

例句：

1. 1. The ruby is a rare gemstone that is often used in jewelry.
   红宝石是一种稀有的宝石，常用于珠宝。
2. 2. The scientist found the new element with its unique properties.
   科学家发现了这种具有独特性质的新元素。
3. 3.The ruthenium catalyst was crucial for the reaction's efficiency.
   钌催化剂对于反应的效率至关重要。