n.二元性
We live in a world of duality, day and night, positive and negative, male and female, etc.
我们生活在一个二元对立的世界：昼和夜，正和负，男和女等等。
The duality illustrated in Mailer's work is rather different.
表现在梅勒作品里的二重性有点不同.
Both photons and electrons show an apparent " duality ".
光子和电子都表现为外观上的 “ 二象性 ”.