The hydraulic valve auxiliary control unit (12) can be connected and cut off by means of an additional auxiliary oil circle (3) related to a main oil circle (2) of the internal combustion engine (1).

液压气门辅助控制单元（12）可借助于一相对于内燃机（1） 的主油回路（2）附加设置的辅助油回路（3）接通和切断。

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A 100ft circle was captured by crop circle authority Lucy Pringle in a field of oil seed rape near Silbury Hill, Wiltshire, on May 3.

2011年5月3日，在英国威尔特郡的西尔布利山下，麦田怪圈研究人员Lucy Pringle在一片金黄的油菜籽地中拍摄到一个直径达30.48米的怪圈。

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Modern society may have come full circle: if oil becomes scarce we may have to return to earlier forms of heating and travel.

现代社会也许恢复原状了：如果石油变得稀少，我们可能又回到从前取暖和旅行的方式了。

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Speculators circle oil and gold like buzzards sniffing financial pestilence.

FORBES: Bernanke Plus Obama Equals $5 Gas Post Election

We've added enough new oil and gas pipeline to circle the Earth and then some.

WHITEHOUSE: President Obama Speaks on Increasing Oversight on Manipulation in the Oil Market | The White House

Thanks to the Vertu partnership, Silent Circle can now add Russian oligarchs, Persian Gulf oil sheiks, and Hollywood celebrities to that list.

FORBES: Silent Circle And Vertu Partner On $10,000 Phone