The process for disposing the acid sludge can reduce the cost of acid-removal, improve the acid-removal efficiency and improve the quality of recovered oil sludge.

该处理石油酸渣的工艺可以降低除酸成本，提高除酸效率并提高回收油渣的质量。

youdao

Of course, there is far more oil underground than can be recovered.

当然，地下的石油远比可回收的多。

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The price of gas has not recovered as quickly as that of oil in recent months, in part thanks to the success of firms like XTO in producing more of the stuff.

近几个月来天然气价格并没有像石油价格那样恢复的那么快，在很大程度上要是因为像XTO这样成功的企业生产了更多的东西。

youdao

Over the years, big oil and gas companies recovered much of the easily reached supplies of gas in America.

VOA: special.2009.10.23

They also argued that the production of this particular oil, recovered from oil sands, imposed more environmental damage than oil produced from conventional deposits.

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There are 2, 900 islanders there whose per capita income can be expected to rise appreciably, if even any substantial oil is recovered there, let alone 60 billion barrels.

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Oil prices recovered substantial losses suffered last week after the International Energy Agency (IEA) announced it would be releasing 60 million barrels of crude from its emergency reserves.

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