It is little wonder, then, that US Energy Secretary Steven Chu, who two years ago described the expansion of coal-fired power plants as his “worst nightmare,” now calls coal a “great natural resource.”
因此，美国能源部长朱棣文现在把燃煤称为一种“伟大的自然资源”并不奇怪，虽然两年以前他还把燃煤发电厂的扩张描述为自己“最糟糕的噩梦”。