根据这个星期签署的一项协议，澳大利亚采矿业巨人力拓公司为一些矿石争取到高于过去几乎一倍的价格。
In a deal signed this week, Australian mining giant Rio Tinto has secured increases that almost double the price of some grades of the mineral.
美国劳动统计局称，1984年至2009年健康保险的费用增加了一倍多，已占到每年平均总支出的3.6%(略高于电费)。
Health insurance more than doubled to 3.6 percent of the average annual spending (slightly more than they spent on electricity) between 1984 and 2009, according to the BLS.
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