It may be that the price of iron ore will fall, hobbling Vale's progress.

也许铁矿石的价格会下跌，从而阻碍淡水河谷的进展。

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For people everywhere — from Boston to Beijing — the 20th century was a time of great progress, but that progress also came with a great price.

无论是波士顿还是北京，对世界各国人民而言，20世纪是一个取得了重大的进步，也为此付出沉重代价的时代。

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Although the Committee anticipates a gradual return to higher levels of resource utilization in a context of price stability, progress toward its objectives has been disappointingly slow.

这要归功于委员会的双重调控。在物价平稳的大背景下，委员会估计更高层次上的资源利用会逐步带来回报，然而其进程却缓慢得令人沮丧。

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As Hack A Day notes, one can easily question the wisdom of "a pair of microwave transceivers and a LiPo battery strapped directly over one's eyes and brain, " but that's the price of progress, right?

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But the IMF warned that the sharp drop in the price of oil may stall progress.

BBC: Iraq economy 'on track' says IMF

Government support, the state of the world aviation industry, the price of oil, customer support, World Trade Organization rulings, the speed of technological progress in composite materials, the reaction of industry behemoths Boeing and Airbus are all known unknowables which cause considerable uncertainty to the board of Bombardier.

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