升级后的规范增加了少量元素,比如 和 。
并含有镍﹐砷﹐锑等少量元素。
It also contains some trace mineral like nickle, arsenic and antimony.
讨论的对象包括了一堆稀土金属以及用于提高工业材料功能的少量元素。
The substances in question include a bunch of rare-earth metals and a few other elements which—used a pinch here, a pinch there—enhance the way many industrial materials function.
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