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
总铁含量的测定 determination of total iron content
无定形的铁铝氧化物 amorphous fe and al oxides
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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