铕

xún qiú jiàng dī yǒu hán liàng de fāng fǎ yǔ jì shù chéng wéi yán jiū zhě yán jiū de guān jiàn wèn tí

寻求降低铕含量的方法与技术，成为研究者研究的关键问题。

Developing the new methods and techniques to reduce the content of europium become the key issues of researchers.