The price of West Texas Intermediate crude oil had been rising steadily this week as Tropical Storm Gustav gathered strength.

随着热带风暴古斯塔夫不断积蓄力量，西得克萨斯中质油的价格也在本周稳步攀升。

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Oil prices fell to their lowest level in 12 years; futures of West Texas intermediate crude closed at $31.41 a barrel, down 5.3 percent.

石油价格跌至12年来的最低水平，西德克萨斯中质原油（West Texas Intermediate）期货报收每桶31.41美元，下挫了5.3%。

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The Enbridge pipeline shutting last Thursday was expected to help reduce stocks at the Cushing, Oklahoma, hub, delivery point for U.S. benchmark crude West Texas Intermediate.

上周三，市场预期Enbridge石油管道的关闭会缩减作为美国基准油wti主要交付地的俄克拉荷马州库欣地区的原油库存。

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The ETF purports to track the price of West Texas intermediate crude oil.

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West Texas Intermediate crude and ICE Brent crude are both priced in dollars.

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West Texas Intermediate crude, the U.S. benchmark fuel, remained largely flat between January 20 and Friday, when the most recent survey was conducted.

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