一种令人似曾相识的说法是贫困国家不应使用肮脏的煤炭发电，相反，他们应当直接“跃升到”离网太阳能技术等更加清洁的能源。
A familiar refrain suggests that instead of dirty, coal-fired power plants, poor countries should “leapfrog” straight to cleaner energy sources like off-grid solar technology.