虽然它仅仅占有我们体重比重的百分之二，它消耗的能量需要占我们全部能量供给的百分之二十，而且它还需要不间断的能量补给。
Although it accounts for only 2 per cent of our body weight, it consumes 20 per cent of our entire energy intake, and it requires constant nourishment.
爱的能量在比重上远远超过憎恨所创造的。
The energy of love far outweighs the energy created by hate.
这个时候运动员的能量来源发生变化：碳水化合物占的比重会上升，脂肪则下降。
This leads to an increased reliance on carbohydrates as the swimmer's main source of energy, and decreased contribution from fat.
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