irrevocable
adj
(fml 文) that cannot be changed or revoked; final 不能改变的; 不能撤回的; 不能取消的; 最後确定性的
an irrevocable decision, judgement, etc 不可改变的决定、 判决等
(finance 财) an irrevocable letter of credit 不可撤销信用证.
The bison skins were sent by rail to cities to be sold.
野牛皮用火车运到城里出售。
It took him some time to connect the long rubber pipe to the air supply pipe that ran round the port, but at last it was done and as a result work was able to progress much faster.