irrevocable

不可改变的；不能取消的；不能挽回的英释中释adjan irrevocable decision, action etc cannot be changed or stopped

1 irrevocable letter of credit,不可撤销信用证

2 irrevocable credit,不可撤销信用证

1 Think about the situation carefully before you take an irrevocable step..在你踏出不能回头的一步之前要三思。