n.两重性；二元性
For many this duality is a source of anxiety. 对许多人来说，这种双重身份正是产生焦虑的原因。
The duality of use value refers to its usefulness and rarity. 使用价值的两重性指的是有用性和稀少性。
It's also an example of duality at its most efficient level. 它也是在它最有效率的层面的一个二元性的例子。
n.个性；个人；特色
