当食物短缺时，反刍动物比非反刍动物寿命更长，因为反刍动物可以从同样的食物中获得更多的能量。
When food is in short supply, a ruminant can last longer than a nonruminant because it can derive more energy out of the same food.
他说：“如果你能在在产生较多能量的前提下减少自由基的产出，那么你就可以避免衰老，同时你的寿命也会提高”。
“If you manage to produce more energy with less free-radical production, then you can avoid aging and increase lifespan, ” he said.
部分禁食能够延长寿命因为减少摄入的食物能够使肌体的细胞能够更充分的利用能量。
Partial fasting may even extend lifespan because eating less sends a message to the cells of the body that they should conserve and use energy more efficiently.
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