当我们变老时，我们必须吃得更少，因为我们的身体发挥正常机能所需的卡洛里减少。
As we age, we need to eat less because our bodies need fewer calories to function properly.
报告建议大多数美国人把活动提高到一个适当的程度并且要改变对食物的选择和卡洛里的摄入以保持理想的体重。
The report recommends that most Americans increase physical activity to a moderate level and make changes in food choices and calories intake to maintain ideal weight.
如果事实果真如此的话，我们或许就有办法解答另一个显而易见的矛盾现象了，它与美国人的日常卡洛里摄入量比过去更大有关。
If so, that might help explain one apparent paradox related to reports that Americans are consuming more daily calories than they used to.
如果事实果真如此的话，我们或许就有办法解答另一个显而易见的矛盾现象了，它与美国人的日常卡洛里摄入量比过去更大有关。
If so, that might help explain one apparent paradox related to reports that Americans are consuming more daily calories than they used to.
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