但是相邻的一个仪表还显示了一些其他东西：车的电容器的总电荷数在递减。

But an adjacent dial shows something else: the amount of charge in the car's capacitors is decreasing.

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超级电容器似乎能够兼备速度和耐久性这两个优势，这是因为和电池类似，在构造上它采的是用离子和电解液而不是简单依靠静电荷。

The reason ultracapacitors may be able to bridge the gap between speed and endurance is that, like batteries, they use ions and an electrolyte rather than simply relying on the static charges.

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电荷存储元件——电容器，可以快速地充放电，但是因为电荷被存储在电容器金属片的表面，所以电荷容量有限。

Electrical storage devices known as capacitors charge and discharge very quickly, but because they hold their charge on the surface of metal plates, their storage capacity is limited.

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