The job of body fat is to store excess energy, or calories.

人体脂肪的功能是贮存多余的脂肪或卡路里.

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Jogging works off my excess energy.

慢跑消耗我过剩的精力.

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The knee generator uses sophisticated electronics to ensure that it grabs only excess energy.

膝盖发电机使用尖端的电子学赖保证它只储存多余的能量.

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