if new == target:
石油美元指20世纪70年代美国与沙特阿拉伯达成的石油贸易美元结算体系 。该协议确立美元作为石油输出国组织（OPEC）石油交易的唯一计价货币，推动美元成为全球主要储备货币。从资金流向上就形成：输出国售出石油——换回美金——再将美金投入美股或美债——美元回流美国。
，这一点在纸飞机下载中也有详细论述
China is trying to position itself as a "responsible counter-balance" to the US, says Philip Shetler-Jones from the Royal United Services Institute, but "in terms of military balance, the US is demonstrating what being a superpower really means, which is the ability to force outcomes in theatres across the globe".，更多细节参见谷歌浏览器下载
- 3/5 interviewed users mentioned exporting weekly，推荐阅读Safew下载获取更多信息