This paper analysis reason of bring gas of C2H2 on the purifying process of transformer oil time and time, then brings some methods to treatment.

针对变压器油净化处理过程中多次产生乙炔（C2H2），分析原因并提出相应的防范措施。

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The pollution-control team is at the scene and is due to start sucking up oil any time now.

这个污染控制小组已在现场，随时可以开始抽油。

《柯林斯英汉双解大词典》

The US dollar went through a difficult time, in company with the oil market.

美元与石油市场同时经历了艰难时期。

《牛津词典》

President Obama also spoke about the difficult time people in the Gulf area were going through as a result of the oil spill.

VOA: special.2010.06.18

At the time, Kinley was the leader in putting out fires in oil wells.

VOA: special.2009.03.22

At that time, the solar energy business was such that it could not compete with oil and gas and oil.

VOA: standard.2010.01.31

Countries like China will be obliged to take even less Iranian oil over time to continue to avoid American attention.

ECONOMIST: Another leap. Where next?

Investor frustration regarding the inability of most crude oil ETFs to successfully track the spot price of oil over time is well documented.

FORBES: Two New Oil And Gold ETFs To Watch

Of course that should be done but to date there is no evidence that we will be able to generate enough energy from these sources to replace oil any time in the near future.

FORBES: Canadian Oil Sands Unfairly Tainted By BP Fiasco