危机爆发前，在持续六年的稳步贬值期间，美元兑一揽子货币累计贬值逾40%，当时推动美元贬值的因素与目前造成美元走软的很多因素相同。

Before the crisis began, the dollar had lost more than 40% of its value against the basket during a steady six-year decline, driven by many of the same factors bedeviling the currency today.

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内务部长肯·萨拉查曾到大峡谷实地考察，考虑到大峡谷的历史，提出要稳步、谨慎、小心地推动这项争议性计划。

The interior secretary, Ken Salazar, visited the Grand Canyon and drew on its history to urge patience, caution and humility in moving forward with what has been a controversial process.

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近年来，这些因素推动房价稳步上升，尤其在大城市现象更加明显。

In recent years all of these have helped to push house prices steadily upwards, especially in big cities.

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