habit

Regular exercise is a good habit.

经常锻炼是个好习惯。

Thinking negatively can become a habit.

消极的思维方式会成为一种习惯。

She has a habit of playing with her hair when she’s nervous.

她有一个习惯，一紧张就拨弄自己的头发。

Some people drink alcohol as much from habit as from desire.

有些人喝酒既是因为想喝，也是出于习惯。