Addax has operations in Gabon, where Sinopec has been involved in oil exploration, as well as in Nigeria and Cameroon.

埃达·克斯在加蓬、尼日利亚和喀麦隆有业务，中石化在加蓬只涉足石油勘探。

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Mark Gilman, an analyst at Benchmark Capital, says Exxon may be behind competitors such as Royal Dutch Shell PLC and Total sa, which have both exploration and refining operations.

Benchmark Capital公司分析师吉尔曼(mark Gilman)表示，埃克森美孚或许已经落后于荷兰皇家壳牌(Royal Dutch Shell)和道达尔(Total SA)等竞争对手，它们都有勘探和炼油业务。

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Mining operations at the existing open pit are due to cease by theend of 2012, although ERA is processing a proposal to develop the undergroundRanger 3 Deeps exploration area.

尽管ERA正在处理一份开发Ranger 3 Deeps地下勘探区的提议，但现有露天矿的开采作业将于2012年底到期。

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New financial players, like South Africa's Nufcor Group and Evolution Markets, a New York-based over the counter brokerage firm, have become active in uranium contracts in the last couple of years, while deep-pocketed investors have financed new uranium exploration operations.

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"More importantly than that financial piece is just the experience gained through the International Space Station, " said Bill Gerstenmaier, Nasa's associate administrator for human exploration and operations.

BBC: Europe and US agree details for Orion astronaut spacecraft

So far, NASA and Harvard researchers have collected data on why people participate in prizes and how the size of the competitor pool affects the outcome, says Jason Crusan, NASA's chief technologist for human exploration and operations.

WSJ: Prizes Abound but Unclear if They Are Best Way to Get Innovation