During the Chávez presidency, Venezuela reclassified its reserves. Previously, there were thought to be just 80 billion barrels of extractable oil, but by 2011, its reported figure had nearly quadrupled. That statistical change was made possible by high oil prices at the time, which allowed previously unviable projects to look feasible.
人 民 网 版 权 所 有 ，未 经 书 面 授 权 禁 止 使 用
。PDF资料是该领域的重要参考
async def drain_requests():。关于这个话题，谷歌浏览器下载提供了深入分析
FT App on Android & iOS