n.兩重性；二元性

For many this duality is a source of anxiety. 對(duì)許多人來說，這種雙重身份正是產(chǎn)生焦慮的原因。

The duality of use value refers to its usefulness and rarity. 使用價(jià)值的兩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層面的一個(gè)二元性的例子。

n.個(gè)性；個(gè)人；特色