polarity
noun [ U ] uk/pəˈlær.ə.ti/ us/poʊˈler.ə.t̬i/
(OPPOSITE)
截然相反，截然对立
the quality of being opposite
The film is based on the polarity of the two main characters. 这部电影以两个主角在性格上的迥异为基础。
(PLACE)
极性
the quality of having two poles
reversed polarity 反极性