an ironclad alibi/contract/excuse/guarantee
无懈可击的不在犯罪现场证明；铁定的合同；滴水不漏的理由；斩钉截铁的保证
His memo is ironclad proof he was involved.
他的备忘录是他参与其中的铁证。
1.装甲的;〈美〉严格的,无可推诿的(誓约等)
1.装甲舰
1.completely definite, and able to be depended on
1.the Karbarrans might have been stokers in a nineteenth-century ironclad, allowing for their thick goggles and long, gleaming teeth.
要是在十九世纪的铁甲舰里，卡巴拉人一定就是司炉，他们戴着厚厚的护目镜，又长又亮的一排牙齿露在外面。
2.By comparison with the narrow, ironclad days of fathers, there was an expansiveness , I thought, in the days of mothers.
跟做父亲那种狭窄，紧张的生活相比，我觉得做母亲的日子过得比较宽松自在。
3.DNA, we thought, was an ironclad code that we and our children and their children had to live by.
我们一直以为，DNA，是铁一般的代码，我们撼动它。
4.An ironclad mauler 's powerful limbs end in long, deadly claws, and its face is a twisted and feral version of a normal bear's face.
一只装甲暴（泰迪）熊拥有强大的长长的四肢，锋利的爪子，比一般的熊类看上去更扭曲的面孔。
5.What's needed next is an ironclad commitment of substantial aid to be delivered after the republics coherent market reforms.
下一步所需要的是一个铁一般的承诺：在各共和国实行一贯的市场改革以后，给予实际的援助。
6.Commentators have said that Netanyahu and Barak declined to give Panetta an ironclad assurance that Israeli would not act alone.
评论家们说，内塔尼亚胡和巴拉克拒绝向帕内塔完全保证以色列不会单独采取行动。
7.Now I had an ironclad excuse for not doing those things, which is none of those things existed then.
现在我可以振振有辞地不做这些事，因为不再需要做这些事情了。
8.The ironclad rule was that full payment had to be made in advance.
所有费用必须预先支付，这是铁的规定。
9.nowadays's TBT already became the international trade the bottleneck to have the ironclad evidence.
对应的中文（二）、现今的TBT己经成为国际贸易的瓶颈是有真凭实据的。
10.The potentate ruled the land with an ironclad fist and earned himself the hatred of the people.
统治者以铁腕统治国家，引起人民的憎恨。