polarity

名词 polarity:

1. a relation between two opposite attributes or tendencies
   同义词：mutual opposition
2. having an indicated pole (as the distinction between positive and negative electric charges)
   同义词：sign

po.lar.i.ty

n.（名词）
【复数】 po.lar.i.ties
Intrinsic polar separation, alignment, or orientation, especially of a physical property:
（二）极性，极：固有的二级分化、排列或定向，特别是作为一种物理属性：
例句：
magnetic polarity; ionic polarity.
磁极性，离子极性

An indicated polar extreme:
极，电的两极性：被指示的极端：
例句：
an electric terminal with positive polarity.
带正极性的一个电极

The possession or manifestation of two opposing attributes, tendencies, or principles:
对立，极端：拥有或展示两种互相对立的特性、倾向或原则：
例句：
political polarity.
政治上的极端对立