总之, 感应电动势滞后于电流.In a word, the induced e . m . f . lags behind the current.任何这样的装置称为电动势源.Any such device is called a seat of electromotive force.这个电池两极的电动势是3.6伏特.The electromotive force between the two poles of this batte...
Photo Gallery: Azurite crystals from Arizona seem to pulse with color.矿物的图片集.蓝铜矿的结晶来自亚利桑那州好像添加彩色.The single-engine plane landed in western Arizona.那架单引擎飞机在亚利桑那州西部着陆。a city in southeastern Arizona美国亚利桑那州东南部城市An Arizona fa...