模仿文本：  But the melting polar caps mean men can now access what's been called "the last frontier" for several months a year. And that has energy companies and countries salivating at the prospect of the riches that lie beneath the region's ice-cold waters. It is perhaps the last great unexplored source of oil and gas on earth.

译文： 但渐渐融化的极地冰冠意味着人们现在可以在那儿呆上几个月的时间，深入这片曾被称为“最后的处女地”的荒原。于是，冰冷的海水中蕴藏的财富吸引着能源公司和世界各国前来勘探。这里可能是地球上剩下且唯一还未开采的石油和天然气资源。