新机制规定，以国内航空煤油价格每吨4140元为基准油价。当国内航空煤油综合采购成本低于基准油价时，停止收取燃油附加；
According to the new mechanism, when jet fuel comprehensive purchasing cost is lower than 4140 yuan per tonne, the benchmark price of jet fuel, airline companies should not charge fuel surcharge.
需求飙升周二将基准油价推升至每桶逾90美元的26个月高位，并给将于本周六召开会议的石油输出国组织（Opec，简称：欧佩克）制造了一个难题。
That surge, which lifted benchmark oil prices to a 26-month high of more than $90 a barrel on Tuesday, is creating a dilemma for the Opec oil cartel, which meets on Saturday.
经济低迷正在抑制市场对石油和天然气的需求，导致基准原油价格跌破每桶50美元。
The economic downturn is drying up demand for oil and natural gas, dropping the benchmark price for a barrel of oil to below $50.
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