铁质的英文：
n. iron substrate

You're anemic, you must have some iron.
你贫血，一定要吃些带铁质的食品。

biotite is a subordinate constituent of the mafic and ultramafic rocks generally
黑云母一般是镁铁质及超镁铁质岩石中的次要成分。

A tonic,pill,or other medication containing iron and taken as a dietary supplement.
铁质;含铁质补药含铁的药水、药片或其它药品，作为一种膳食补充来服用

The best source of iron is from meat, chicken, fish, Chinese date, legumina and some leaf vegetables.
最好的铁质来源是肉，鸡，鱼，枣，豆类以及一些带叶子的绿色食品。

4.The iron is distributed in the crackle place more, brown or brown and black, the naked eye can be distinguished.
铁质多分布于裂纹处，呈褐色或褐黑色，肉眼可辨。

Exercising too much with no iron supplements will tip one over the edge into a more serious deficiency.
锻炼太多而又未服铁质补剂，可能改变人体的含铁量，使之处于严重缺铁状态。

The hot iron seared the trousers.
热熨斗烫焦了长裤。

Iron oxide red pigments
GB/T1863-1989氧化铁红颜料

Strike while the iron is hot.
打铁趁热。

Iron corrode easily.
铁易受腐蚀。

The party has iron discipline!
党有铁的纪律！

Racemization is found with optically active substrate substrates
发现旋光基质有外消旋作用。

The rate of substrate change is dependent of substrate concentration.
被酶作用物变化速率取决于被酶作用物的浓度。

To deposit(a metal)on a substrate by vacuum sublimation.
使沉淀通过升华使(金属)等沉淀在底层

An oxidoreductase that catalyzes the incorporation of molecular oxygen into its substrate.
氧酶对有机化合物与分子氧反应起催化作用的一种酶

An enzyme that catalyzes the addition or removal of water from a substrate.
水化酶促进水加到酶解物或从酶解物中除去水的一种酶