不可更改用英语怎么说？

不可更改

例句

• But most meetings are seen as immovable blocks in diaries. 但是大多数会议被视为工作日程表中不可更改的部分.
• The umpire's decision is final. 裁判的裁定是不可更改的。
• The judges' decision is final... 法官的判决不可更改。