The reactions of fish to AC can be distinguished into four stages: electrifying, electrotaxis, electronarcosis and electrocuting.鱼对交流电的反应可分成四个阶段: 感电 、 定向 、 麻醉和击昏反应....
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...
这包裹的封皮扯不开.The cover of the parcel won't tear.我廉价买下了它,因为它的封皮坏了.I got it cheaply as its cover was torn.赫伯尔特用铅笔在一本书的封皮里边写了些什么.Herbert had been writing with his pencil in the cover of a book....