未利用能源

reduced energy───减少的能量

increased energy───增加能量

consume energy───消耗能量

nuclear energy───n.[核]核能

boundless energy───无穷的精力

confused elderly───困惑的老人

expend energy───花费精力；消耗能量

That occurs when they take in more energy than they expend. The unused energy is stored as fat.───这种情况发生在他们吸收的能量多余消耗的能量时，未消耗的能量就以脂肪的形式被储存下来。

Unused energy from sweets turns into fat in your body.───甜食中未用掉的能量，就会变成你体内的脂肪。

Most humans and other animals gain weight because they accumulate fat. That occurs when they take in more energy than they expend. The unused energy is stored as fat.───大部分人和其他动物的体重增加是因为体内脂肪的积聚。这种情况发生在他们吸收的能量多余消耗的能量时，未消耗的能量就以脂肪的形式被储存下来。

We had all this unused energy, that is the main thing I remember.