'petrodollar'这个词语来源于英语，它指的是石油输出国家在石油贸易中所获得的美元收入，这些美元往往被重复使用，进而形成了大规模的美元储备，从而支撑了美元的国际货币地位。
以下是9个含有'petrodollar'的例句：
1. The increase of petrodollar income has propelled the development of many countries in the Middle East. （石油美元的增加促进了中东许多国家的发展。）
2. The petrodollar system was established in the 1970s after the oil crisis. （石油美元系统是在xx年代的石油危机后建立的。）
3. The United States benefits greatly from the petrodollar system as the dollar serves as the primary international currency for oil trade. （美国从石油美元系统中获得了巨大利益，因为美元成为了石油贸易的主要国际货币。）
4. Some experts argue that the petrodollar system is under threat due to the rise of alternative energy sources. （一些专家认为，随着另类能源的崛起，石油美元系统正面临威胁。）
5. The petrodollar funds have been invested in a variety of areas, including real estate, technology and infrastructure. （石油美元基金被投资于包括房地产、科技和基础设施在内的多个领域。）
6. Some critics argue that the petrodollar system is a form of economic imperialism that benefits only the United States. （一些批评者认为，石油美元系统是一种经济帝国主义，只有美国从中获益。）
7. The use of petrodollars has influenced the foreign policy of many oil-producing countries, often leading to conflicts with other nations. （使用石油美元已经影响了许多石油生产国的外交政策，经常导致与其他国家的冲突。）
8. The growth of the petrodollar market has led to increased demand for financial services and investment opportunities. （石油美元市场的增长促使对金融服务和投资机会的需求增加。）
9. In recent years, some countries have sought to reduce their dependence on petrodollars by diversifying their economies and investing in alternative energy sources. （近年来，一些国家通过多元化经济和投资另类能源来减少对石油美元的依赖。）
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