| 单词 | 铜矿 |
| 释义 | 〔Rancagua〕A city of central Chile south of Santiago. It is primarily an agricultural center in a copper-mining area. Population, 139,925.兰卡瓜：智利中部一城市，位于圣地亚哥市以南。为一铜矿区内的主要农业中心。人口139,925〔Kitwe〕A city of north-central Zambia near the Zaire border. It was founded in 1936 as a copper-mining center. Population, 207,500.基特韦：赞比亚中北部靠近扎伊尔边境的城市。1936年作为铜矿中心建成。人口207,500〔palladium〕A soft, ductile, steel-white, tarnish-resistant, metallic element occurring naturally with platinum, especially in gold, nickel, and copper ores. Because it can absorb large amounts of hydrogen, it is used as a purification filter for hydrogen and a catalyst in hydrogenation. It is alloyed for use in electric contacts, jewelry, nonmagnetic watch parts, and surgical instruments. Atomic number 46; atomic weight 106.4; melting point 1,552°C; boiling point 3,140°C; specific gravity 12.02 (20°C); valence 2, 3, 4. See table at element 钯：一种柔软的，易拉长的，银白色的，保持光泽的金属性元素，常与铂共生，尤其在金、镍和铜矿中存在。因为它能吸收大量氢，常用作除氢的过滤器或氢化作用的催化剂。其合金可用于电子接触器、珠宝、无磁性表部件以及外科医用器具。原子序数46；原子量106.4；熔点1,552°C；沸点3,140°C；比重12.02（在20°C时）；化合价2，3，4 参见 element〔cadmium〕A soft, bluish-white metallic element occurring primarily in zinc, copper, and lead ores, that is easily cut with a knife and is used in low-friction, fatigue-resistant alloys, solders, dental amalgams, nickel-cadmium storage batteries, nuclear reactor shields, and in rustproof electroplating. Atomic number 48; atomic weight 112.40; melting point 320.9°C; boiling point 765°C; specific gravity 8.65; valence 2. See table at element 镉：一种质软的，蓝白色的金属元素，最初存在于锌矿、铜矿和铅矿之中，这种金属易于用刀切割，用于制造低摩擦阻力和耐疲劳的合金、焊料、牙科用的混合填料、镍镉蓄电池、核反应堆防护层和防锈电镀之中。原子序数48；原子量112.40；熔点320.9°C；沸点765°C；比重8.65；原子价2 参见 element〔bornite〕A brownish-bronze, lustrous copper ore with the composition Cu5FeS 4 that tarnishes to purple when exposed to air. 斑铜矿：一种棕铜或亮铜矿Cu5FeS 4，含有当暴露于空气时会变成紫色的化合物 〔azurite〕An azure blue vitreous mineral of basic copper carbonate, Cu3(CO 3) 2(OH) 2, used as a copper ore and as a gemstone. Also called chessylite 蓝铜矿，石青：天蓝色透明无机物碱性碳酸铜，Cu3(CO 3) 2(OH) 2，用作一种铜矿或宝石 也作 chessylite〔cuprite〕A natural red secondary ore of copper, essentially Cu2O, that forms as a result of weathering. 赤铜矿：一种天然的红色次生铜矿，其基本元素为Cu2O，作为风化的产物而形成 〔Karaganda〕A city of northeast Central Asian U.S.S.R. north-northeast of Tashkent. Founded in 1857 as a copper-mining settlement, it is now the center of a coal industry. Population, 617,000.卡拉干达：苏联中亚部分东北部一城市，位于塔什干东北偏北。1857年该市作为铜矿开采点而建立，现今成为煤矿工业中心。人口617,000 |
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