a group of six metals, ruthenium, osmium, rhodium, iridium, palladium, and platinum, with similar physical and chemical properties and a tendency to occur naturally together
| 单词 | platinum metals |
| 释义 | platinum metalspl nouna group of six metals, ruthenium, osmium, rhodium, iridium, palladium, and platinum, with similar physical and chemical properties and a tendency to occur naturally together |
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