不可撤回的 meaning in English

irrev irrev,irvcbl=irrevocable
irrevocable

All rights granted under this license are granted for the term of copyright on the program , and are irrevocable provided the stated conditions are met
所有在本授权下赋予的权利是在本程序的版权有效时期中被赋予的，而且只要所述的条件都满足了，这些权利是不可撤回的。
Commission at 3 % and payment by 100 % onvalue confirmed , irrevocable letter of credit available by draft at sight are the practical terms on which we always work with other buyers
佣金和100 %保兑的，不可撤回的即期信用证付款均系我们与其它买户业务中实际运用的条款。