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。

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.

youdao

形成好习惯、改掉坏习惯。

Developing good habits and overcoming bad habits.

youdao

及早发现糜烂并防止犬只继续舌舔对于降低炎症反应和防止坏习惯的形成非常重要。

It is important to catch lesions early and keep the dog from licking to then reduce inflammation and development of a habit.

youdao