He told us a story to illustrate the fact that bad habits die hard.
（他通过给我们讲故事来阐明积习难改的事实。
In truth, I found myself incorrigible with respect to order.
真的，我发现自己在“秩序”方面实在积习难改。
The older politician is too set in their way to understand the importance of these new idea
那些老迈的政客们积习难改,无法了解这些新观念的重要性
Old habits die hard, however, and when he went hiking while on a trip to New Zealand, the notebook went along too.
然而积习难改，他在新西兰旅游外出远足时，仍然随身带着笔记本。
The older politicians are too set in their ways to understand the importance of these new ideas.
那些老迈的政客们积习难改,无法了解这些新观念的重要性。
Yet traditions are difficult to displace.
但传统习惯却很难改变。
Laziness is my besetting sin.
懒惰是我积重难返的恶习。
The Cause of and the Strategies in Overcoming the Difficulties in Learning Calculus by the Students of the Vocational Higher Education Institutions;
高职学生学习微积分困难的原因及对策
It's hard for him to get out of the groove
他很难改变因循守旧的习惯。
It is a routine, a habit too long established to alter.
机械的程序、老习惯，形成已久，难以改变。
Those whom indolence infects are seldom reformed.
感染上懒惰恶习的人难于改正。
It's hard for old people to change their ways.
老年人很难改变自己的习惯.
I know that. But it's difficult to change a habit. I'm used to sleeping late.
我知道。但是习惯很难改变。我习惯了晚起。
A Research on Improving the Learning Strategy for the Mathematics Learning Difficulty Students in High School;
改进高中数学学习困难学生学习策略的研究
What is bred in the bone will not(or:never)out of the flesh.
生来的习惯不易改掉。/江山易改，本性难移。
Changing habits is hard, but can be done by tremendous commitment.
改变习惯是困难的，但只要下定特大的决心，习惯是可以改变的。
Reforming the Teaching Methods to Arouse the Students Learning English Enthusiasm;
改革教学方法 调动学生学习英语的积极性
Positive Psychological Changes Induced by Chinese Calligraphy Practice:a Review of Empirical Studies
书法练习促进心理积极改变的实证研究述评