More than one-quarter of the world's oil and almost one-fifth of the world's natural gas come from offshore, even though offshore drilling is six to seven times more expensive than drilling on land.
全球超过四分之一的石油和近五分之一的天然气来自近海，尽管近海钻探的成本是陆地钻探的六到七倍。
Explaining to a friend how to find his apartment, he said, "Come up to the fifth floor and ring the doorbell with your elbow."
一个声名狼藉的小气鬼终于决定要请一次客了。他在向一个朋友解释怎么找到他家时说：“你上到五楼，用你的胳膊肘按门铃。”
The fourth assessment report was published in 2007; the fifth is slated to come out in installments starting in 2013 and finishing in 2014.
第四次评估报告发表于2007年，第五个预定从2013年开始2014年结束以分期方式发布。
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