ac
Meanings
辅助运煤船
Examples :
自治县
Examples :
英亩尺寸
Examples :
边境决斗,边境单挑.
Examples :
交流电
An electric current in which the direction of flow of the electrons reverses periodically by a sinusoidal law, hence having an average of zero, with positive and negative values (with a frequency of 50 Hz in Europe, 60 Hz in the US, 400 Hz for airport lighting, and some others); especially such a current produced by a rotating generator or alternator.