1. To improve this habitual way of standing or sitting, start by keeping your hands away from your mouth, and keep your arms uncrossed.
    要改变这种习惯性的站姿或坐姿，你应该一开始就别用手捂着你的嘴，并且别再把双臂交叉起来。

2. He was a habitual thief.
    他是个惯贼。

3. He is a habitual smuggler.
    他是个走私惯犯。