以下为句子列表：
英文: 3 Brass powder: three kinds of powder, type10, type20 and type30 , can been offered. Rare earth element and other trace amount of alloy element can been added.
中文: 黄铜粉：分10、20、30黄铜粉，可添加稀土等微量合金元素，分为用于含油轴承及金刚石制品两类。
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英文: According to the comparison and analysis of mineral composition and geochemical characteristics of trace element, sulfur isotope, hydrogen and oxygen isotope, lead isotope and rare earth element in the gold ore and the altered spilite from the deposits of
中文: 摘要通过对铧厂沟金矿床金矿石和蚀变细碧岩矿物组成、微量元素、硫同位素、氢氧同位素、铅同位素及稀土元素地球化学特征地对比分析，得出金矿石对该基性火山岩存在明显的继承性。
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英文: The relations of surface fractal dimension with catalyst selection, catalyst preparation method, rare earth element content and catalyst treatment process have been discussed in detail.
中文: 对于甲烷、二氧化碳与氧气催化氧化重整反应,在利用盒子维法测定催化剂表面分形维数的基础上,考察了表面分形维数与催化剂筛选、催化剂制备方法、稀土元素添加量和催化剂反应前后的处理等之间的关系,实验证明分形是一种有效的工具。
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