People have known how to make ethanol since the dawn of civilisation, if not before.
如果不能说在人类文明开始之前人们就学会制造乙醇，那这也是人类文明刚刚出现就有的事了。
The failure to reduce oil dependence is not the only flaw in the ethanol program.
降低对石油依赖失败的原因不是因为乙醇项目存在问题。
The failure to reduce oil dependence is not the only flaw in the ethanol program.
降低对石油依赖失败的原因不是因为乙醇项目存在问题。
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