magnetic field

magnetic-field的词性：
n.（名词）

1. A condition found in the region around a magnet or an electric current, characterized by the existence of a detectable magnetic force at every point in the region and by the existence of magnetic poles.
磁场：一种发生在磁体或者电流四周区域中的情形，其特点是在这个区域中的每一个点都存在着可测试到的磁力，并且存在着磁极