发现了新石油储量的西非国家需要为开采、钻进和管道建设融资，这意味着它的对冲期长达10—20年，而不是区区90天。
A West African country with newly discovered oil reserves needs to finance exploration, drilling, and pipeline construction, which means that it needs to hedge at a time horizon of 10-20 years, not 90 days.