Metal Impurity的用法和樣例：
例句
- Introduction of metal impurity into TiO_2 to improve the photocatalytic activity of TiO_2 has been studied widely.
在二氧化鈦中引入金屬雜質以提高二氧化鈦的光催化活性受到人們的廣泛研究。 - Advanced manufacturing processes are applied and the content of metal impurity is rigorously controlled.The oxidant is reduced to the minimum extent in each manufacturing process.
採用先進位程並嚴格控制金屬雜質的含量，並在每一製程中將氧化物降至最低程度。
