inveterate habit

例句：

1. 1. He has an inveterate habit of smoking after dinner.
   他有一个顽固的习惯，饭后抽烟。
2. 2.The inveterate habit of punctuality is a virtue.
   不守时的习惯是一种美德。
3. 3. Despite her efforts to change, she still has an inveterate habit of procrastinating.
   尽管她努力改变，但她仍然有顽固拖延的习惯。