the rare-earth element

• 稀土元素

The Rare-earth Element的用法和样例：

例句

1. The color of Apatite is often due to the presence of rare earth elements.
   磷灰石的颜色常取决于存在的稀土元素。
2. The extent of beneficial effect of each element considerably depended on its affinity for oxygen.
   各合金优良的抗氧化性与稀土元素对氧的亲和力密切相关。