That would be especially true Smith believes, in the Arab Gulf states, where the U.S.for decades has ensured the security of the world's largest oil reserves.

VOA: standard.2010.03.18

I don't know what percent; our oil reserves in the U.S. are pretty small, so we're kind of lying somewhere inside-- maybe on this pink line.

我不知道具体占百分之几;,美国的石油储备量是微不足道的，所以我们可能是位于这附近-,也许在这条粉线上面。

耶鲁公开课 - 金融市场课程节选

Iraqi Kurds claim Kirkuk, which sits on significant oil reserves, but the city's Arab and Turkmen residents say it must remain under the control of the central government.

VOA: standard.2009.11.08

In December, Russian President Dmitri Medvedev criticized Rosneft, the state run company that owns the world's largest oil and gas reserves, for spending only of its revenues on research and development.

VOA: standard.2010.02.03