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Central to the operation is a mile-deep well, dug originally to explore for oil.

那次行动的重点是一口原本为勘探石油而挖的一英里深的井。

《柯林斯英汉双解大词典》

The NCOIC pointed to the recent Haiti operation or the Gulf of Mexico oil spill as examples where different networks or countries could communicate using these standards.

NCOIC指出，最近海地的操作或墨西哥海湾地区石油泄漏可以作为例子，不同的网络或国家可以互相使用这些标准。

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Earlier Friday, BP's incoming CEO Bob Dudley, said it is time to scale down the vast operation to clean up the Gulf of Mexico oil spill, but he stressed his company's commitment to fully restore the environment.

VOA: standard.2010.07.31

Last year, a report by the United Nations Environment Programme said that over half a century of oil operation in the region, by firms including Shell, had caused deeper damage to the Ogoniland area of the Niger Delta than earlier estimated.

BBC: Nigeria oil spills: Shell rejects liability claim

That changed the nature of the business from primarily an oil sands operation to a more diversified company.

FORBES: Suncor or Cenovus: Which Is A Better Buy?

When EnCana ( ECA) spun off its oil sands operation into a separate company last year, it created a dilemma for some investors.

FORBES: Suncor or Cenovus: Which Is A Better Buy?