Millions of people around the world suffer from a self-mutilating and often painful addiction to biting their nails, which can be harder to quit than smoking cigarettes, but is often overlooked as a relatively benign habit. 世界各地有数以百万计的人群正在遭受自残而痛苦的恶习困扰:咬指甲!这个习惯比烟瘾还难戒掉,然而人们以为它是相对不那么有害的习惯因而常常忽略它。
Rather, I suggest, nail biting is just the result of a number of factors which – due to random variation – combine in some people to create a bad habit. 我认为:咬指甲仅仅是由于诸多因素引发的由于随机变异一些人形成坏习惯的结合。
He was biting his finger-nails, as was his habit when he was being cagey. 他咬着手指甲,这是他不愿明确表态时的习惯动作。