International energy economic analysis frequently involves conversion of all monetary figures to a single currency, typically the US dollar. This can cause significant variation in estimation of values that change over time such as learning rates for new energy technologies.

中文翻译：

---

仔细的货币换算

国际能源经济分析经常涉及将所有货币数字转换为单一货币，通常为美元。这可能会导致随时间变化的值的估计产生重大变化，例如新能源技术的学习率。