habit persistence hypothesis

例句：

1. 1. She has developed a habit of going to bed early every day.
   她养成了每天早早睡觉的习惯。
2. 2. The doctor advised him to change his bad habit of smoking.
   医生建议他改掉吸烟的坏习惯。
3. 3. It's important to develop good habits from an early age.
   从小养成好习惯很重要。