If a change is irreversible, things cannot be changed back to the way they were before.
例句
She could suffer irreversible brain damage if she is not treated within seven days...如果她在 7 天之内没有得到治疗,她的大脑有可能遭受不可逆转的损伤。The reforms are irreversible.改革没有回头路。
英汉词典释义
adj.
不可更改的;不可挽回的,不可反转的
irreversible damage不可弥补的损失Technology has had an irreversible impact on society.技术已对社会产生不可逆转的影响。The decision is irreversible.这一决定不能取消。