因为电池能存储的总能量依赖于它电极的体积，一个小的电池是不能长时间供电的。
The amount of energy a battery can store depends on the volume of its electrodes, so a thin battery does not last long.
因为电池能存储的总能量依赖于它电极的体积，一个小的电池是不能长时间供电的。
The amount of energy a battery can store depends on the volume of its electrodes, so a thin battery does not last long.
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