Definition
Describes a belief or habit that is very difficult to change or give up.
固守难改，歸日日新
Even in an era of rapid technological advancement, the preference for traditional paper books dies hard.
即使在科技快速发展的时代，人们对传统纸质书籍的偏好依然根深蒂固。
Despite considerable evidence showing the health risks of smoking, the habit dies hard for many people.
尽管有大量证据显示吸烟对健康的危害，但对许多人来说，这个习惯很难戒除。
He sticks to his way of doing things, even when new methods are more effective; old habits die hard.
他坚持自己的做事方式，即使新方法更有效；旧习惯很难改变。