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Mineral exploration made important progress in .coal, uranium, iron, gold, silver, copper, nickel, zinc, lead, antimony, tungsten, molybdenum, vanadium, kainite and characteristic non-metal.

矿产勘查、铁、金、银、铜、、铅、锌、锑、钨、钼、、钾盐及特色非金属矿产取得重要进展。

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a matter of, a mess of, a moment ago, a moment later, a number of, a pack of, a packet of biscuits, a packet of sweets, a pair of, a pair of trousers,

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3G, 401(K), a,

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CNN 10 学生英语 20189合集

Columbia University researchers using this machine found the vapor has toxic metals like chromium, nickel, zinc and lead and as we know, there's no safe level of lead.

哥伦比亚大学研究者使用这种机器发现了气雾中有有毒金属,例如铬、、锌、铅,而我们知道,只要铅就是危险

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Mises Institute

Other industrial metals include copper, titanium, magnesium, nickel, zinc, chromium, and lead.

工业金属包括铜、钛、镁、、锌、铬和铅。

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a sort of, a speck of, a spectrum of, a strip of, a suite of, a sum of money, a type of, a variety of, a wealth of, a.,

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3G, 401(K), a,
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