如果我们能弄清楚如何提高我们使用能源的效率，我们就能用可利用的能源做更多的事情。
If we could figure out how to improve the efficiency with which we use energy, we can do a lot more work with the energy that is available.
我们使用能源的数量对总消耗量有直接的影响。
The amount of energy we use has a direct effect on overall consumption.
改变我们使用能源的方式是一个基本问题，做到这一点并不容易。
It's hard to change something as fundamental as how we use energy.
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