Calories are a way of keeping track of the body's energy budget.

卡路里是一种监测人体能量 消耗量的方法。

That number is essentially the imbalance in earth's energy budget resulting from human influence on climate, and that number is expressed in watts per meter squared.

这个数字本质上是由于人类对气候的影响而导致的地球能量收支失衡，这个数字以每平方米瓦特表示。

So while there might be significant increases in energy use at localized regions of the brain when we perform difficult cognitive tasks, when it comes to the whole brain's energy budget overall, these activities don't significantly alter it.

因此，尽管我们执行有难度的认知任务时，大脑局部区域的能量消耗可能会显著提升，但是就整个大脑的能量平衡来说，这些认知任务并不能导致能量总和发生显著改变。