韦伯磁通量的国际单位，等于当磁通量在一秒钟内被统一地减弱为零时在它联接的一圈电路内产生一伏特电动势时的磁通量
The SI unit of magnetic flux equal to the magnetic flux that in linking a circuit of one turn produces in it an electromotive force of one volt as it is uniformly reduced to zero within one second.
伏安法功率单位，等于一伏特和一安培的乘积，等于一瓦特
A unit of electric power equal to the product of one volt and one ampere, equivalent to one watt.
伏击从隐蔽地点进行的突然袭击
A sudden attack made from a concealed position.
