translation.en: And it's got the three main characteristics of addiction: tolerance, you need to see them more, and more, and more; withdrawals; and last, relapse.
translation.zh: 成瘾的三个主要特征也在爱情上得以体现： 首先是耐受性——你总是想要得到更多以维持最初的感觉， 而后耐受性消退，最后又复发。