They are exactly alike except that they have opposite electrical charges.
除了电荷相反外，它们完全一样。
They are exactly alike, except that they have opposite electrical charges.
它们完全一样，除了电荷相反。
What is needed for electrical charges to flow?
电荷流动需要什么条件？
It is triggered when electrical charges build up in storm clouds.
电荷在积雨云中聚积起来就会触发闪电。
We often compare the flow of electrical charges to the flow of water.
我们时常把电荷的流动比喻为水的流动。
This energy is something like positive and negative electrical charges pulsating throughout.
这种能量就像正负电荷一样脉动着流遍全身。
It provides power for electrical system when the vehicle rotates and charges for the battery.
它在汽车运转时为电气系统提供动力，并为电池充电。
It provides power for electrical system when the vehicle rotates and charges for the battery.
它在汽车运转时为电气系统提供动力，并为电池充电。
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