It is usually colorless, transparent, but the iron-group elements may have different colors such as purple dispute, yellow, gray smoke, and so on.

它通常为无色透明，但含铁族元素时可具有不同的颜色，如紫争、黄色、 烟灰色等。

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The general adverse reactions were wore less in intravenous iron group (9 %) than that in oral iron group (33%).

不良反应发生率静脉铁剂组是9%，口服铁剂组为33%。

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The result showed that the effect on the growth of the two groups were very similar. but in the Bu quinoline iron group, feed to gain ratio decreased 3.1%, cost to gain ratio decreased 2.7%.

结果表明：两组促生长效果差异不显著，但卟啉铁组比阿散酸组单位增重耗料降低3.1%，单位增重成本降低2.7%。

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The World Steel Association, a steelmakers' group, predicted early this month that the iron-ore market should stay balanced this year before moving into progressive surplus between 2014 and 2017 as new mine capacity comes on stream.

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"In things like iron ore, there must be competition concerns - maybe as a combined group, they would have to dispose of something, " he added.

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