rare-earth metal

• 稀土元素

rare-earth metal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. This method could determine many non-REE in enriched-europium mixture rare earth oxide at a time and it was a rapid method.
   该方法能同时测定富铕混合稀土氧化物中多种非稀土元素的含量，提高了分析速度。