In electric railway traction substation, power capacitors and harmonic filters are the important devices for improving both the power factor and the power quality.

在电气化铁道牵引变电站中，装设无功补偿电容器和谐波滤波器是提高功率因数、改善电能质量的重要手段。

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Normal capacitors—those that power the flashguns in cameras for instance—can be charged and discharged rapidly, but cannot store much energy.

普通的电容 -- 比如照相机闪光灯里用的那种 -- 能够进行快速地冲放电, 但是不能储存太多的能量.

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Super capacitors, however, store much more energy than their traditional counterparts and are used to power small devices such as toys including model planes and helicopters.

但是，比起传统电容，超电容器能够储存更多的能量，并且可以为小的设备如模型飞机和玩具直升飞机等玩具提供电能。

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Traditional inverters gather power from all or most of the panels in an installation and use transformers, capacitors and switches to change it from direct current to alternating current.

FORBES: Inverters: Solar's Next Star?