名詞 polarity:

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

po.lar.i.ty

n.（名詞）
【復(fù)數(shù)】 po.lar.i.ties
Intrinsic polar separation, alignment, or orientation, especially of a physical property:
（二）極性，極：固有的二級分化、排列或定向，特別是作為一種物理屬性：
例句：
magnetic polarity; ionic polarity.
磁極性，離子極性

An indicated polar extreme:
極，電的兩極性：被指示的極端：
例句：
an electric terminal with positive polarity.
帶正極性的一個電極

The possession or manifestation of two opposing attributes, tendencies, or principles:
對立，極端：擁有或展示兩種互相對立的特性、傾向或原則：
例句：
political polarity.
政治上的極端對立