high-purity metal

例句：

1. 1.The new car has a high-purity aluminum body.
   这款新车采用了高纯度铝合金车身。
2. 2.The scientist used high-purity metal to make the experiment.
   科学家使用高纯度金属制作了实验。
3. 3. The gold is of high-purity and is highly valued by collectors.
   黄金是高纯度的，深受收藏家们的青睐。