platinum/ˈplætɪnəm; `plætnəm/ n[U](chemistry 化) greyish-white metallic element that does not tarnish, used to make jewellery and, esp in alloys with other metals, in industry 铂; 白金 a sapphire in a platinum setting 白金托镶著的蓝宝石. =>App 10 见附录10.
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