If you say that someone's attitude or behaviour is an affectation, you disapprove of the fact that it is not genuine or natural, but is intended to impress other people.
例句
I wore sunglasses all the time and people thought it was an affectation...我成天戴着墨镜，大家都觉得我在装酷。Lawson writes so well: in plain English, without fuss or affectation.劳森写得很好：英文通俗易懂，朴实无华又不矫揉造作。
英汉词典释义
n.
假装，装模作样，故弄玄虚
without affectation老老实实地, 直率地He speaks with a British accent, but that is just an affectation because he’s not British.他说话带有英国口音，但这是装出来的，因为他不是英国人。He made an affectation of indifference.他装出无动于衷的样子。
装模作样的言行;矫情
Her posh accent is pure affectation.她的时髦腔调纯粹是矫揉造作。The affectations in the way she speaks annoyed me.她说话时装腔作势的样子惹我恼火。