英语词汇placer platinum怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	placer platinum
释义	placer platinum 简明释义砂铂网络释义 1 ?砂铂 ... stream placer 河床砂矿 placer platinum 砂铂 iron placer 砂铁矿 ... 2 ?砂铂矿 ... 镍铂矿 nickel platinum 砂铂矿 placer platinum; platinum placer 砷铂矿 sperrylite ... 短语 1 platinum placer 铂砂矿 ; 砂铂矿 2 platinum-gold placer 铂金砂矿 3 platinum-group metal placer 铂族金属砂矿双语例句 1 The studied platinum - gold placer occurs in Quaternary alluvial - diluvial a piedmont valley of ultrabasic rocks, Northwest China. 该铂- 金砂矿产于超基性岩体山前谷地的第四纪冲积- 洪积层中。 2 Platinum is found usually as alloys of 80-90% purity in placer deposits or more rarely combined with arsenic or sulfur. 通常铂在砂矿中以合金形式存在，其中包含80～90%的纯铂，或者不多见的是与砷或硫结合在一起。
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