a barrel of oil的意思|示意

And it will have, I think, an important effect on the price of a barrel of oil.

而且我认为，那会对每桶石油的价格产生重要的影响。

The first was a fall in the oil price from its $147-a-barrel peak. The second was the rescue of Fannie Mae and Freddie Mac and some better-than-expected results from the banking sector.

第一件是油价从最高的每桶147美元的价格有所回落；另一件是房地美和房利美股票价格的控制，以及一些从银行业传来的比预期要好的结果。

On average, oil firms emit 7.8kg of carbon dioxide for every barrel they produce in Norway, compared to a global average of 19kg, according to StatoilHydro.

据StatoilHydro公司统计，平均来算，石油公司每生产一桶石油就会排放出7.8公斤的二氧化碳，而全球的平均值为19公斤。

Oil prices have been volatile over the past year, peaking at an all-time record of more than $147 a barrel a year ago, plunging to below $40 in December and recovering to more than $70 last month.

过去的一年油价反复无常，一年前最高创下了超过147元/桶的纪录，在12月又下降到低于40美元/桶，上个月恢复到超过70美元/桶。

What if the equilibrium price of a barrel of oil in a world growing at trend levels is above $90?

照全球现在的增长趋势，如果每桶石油的均衡价格高于90美元会怎样？

The average cost of producing a barrel of oil fell 1.4 percent to $19.50 from a year earlier and Cnooc will seek to maintain its “low-cost advantage, ” according to the statement.

中海油在声明称，与去年相比，每桶石油的平均生产成本下降了1.4%，为$19.50，中海油将设法保持“低成本优势”。