石油的真正成本不仅仅是每桶的价格，还包括环境和社会影响。
The true cost of oil isn't just the price per barrel—it's the environmental and social impact.
解释：看到兔子再回头唤猎狗，还不算太晚；跑掉了羊再去修补羊圈，也不算太迟。
I'm not a legend, I'm just a man who became one.
The more I write, the more I disappear.