4、磁场（magnetic field）是在磁铁（magnet）周围、由磁力线（ magnetic lines of force ） 所占据（ occupy ）的 空间。 5、这就导致了该模型中的电池电压（battery voltage）为 840 毫伏 （mV）。
基于177个网页-相关网页
The magnetic lines of force don't exist , they are defined by scientists.
磁力线并不存在，它是由科学家所定义。
It has been suggested that birds can sense the magnetic lines of force stretching from the north to south magnetic poles of the earth, and so direct themselves.
有人认为，鸟类能觉察得出地球自北向南磁极的磁力线，因而能为自己导向。
The existence of electric current in the conductor(not closed)which is cut-ting the magnetic lines of force(B-lines) variably in the magnetic field is pointed out, and the acceleration is discussed.
指出了在磁场中做变速切割磁力线（线）运动的导体（不闭合）中有电流存在，讨论了其运动加速度。
应用推荐