mixed rare earth的用法和样例：
例句
- 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。 - Mixed RE elements could improve the conductivity of pure aluminum with relatively high content of impurities, but had little effect on that with relatively low impurity content.
混合稀土对杂质含量较高的纯铝的导电性有改善，对杂质含量低的纯铝的导电性基本不起作用。
