adj. ironclad ; fixed ; unalterable
铁含量的测定 Determination of iron content
铁量的测定 Determination of iron content
铁的测定 Determination of iron
生铁的定义和分类 Definition and classification of pig-irons
三氧化二铁的测定 Determination of iron oxide
不稳定的铁 labile iron
酸溶性铁的测定 Determination of acid-soluble iron
假定的铁回升 Assumed iron pick-up
总铁含量的测定 determination of total iron content
美国将继续对该地区的盟友保持“铁定的”承诺。
The United States will keep its "ironclad" commitment to allies in the region, he added.
既然有这么多铁定的规律,父母们又应该做些什么呢?
我告诉你的每一件事都是铁定的,我许诺,没有必要怀疑我。
Everything I'm telling you is ironclad , I promise! You have no need to doubt me.
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