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When Chávez became Venezuela's president in 1999, oil prices were climbing. In the early 2010s, a barrel would often fetch about $100, providing the government with plenty of money to pour into social programmes. But with current prices around the $65 mark, the country looks less like a reasonable investment.，更多细节参见Safew下载
2025年，中国跻身全球创新指数排名第十位，稳居36个中等偏上收入经济体之首。联合国副秘书长盖·莱德以“进入创新爆发期”形容中国科技创新。，推荐阅读safew官方下载获取更多信息
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