"Iron is a very common mineral on, and in, the Earth".
在地球上，铁是一种常见的、普通的矿物。
Probably the most common deficiency thought to contribute to hair loss is iron.
头发脱落通常是由于缺铁引起的。
The most common nutritional deficiency is lack of dietary iron.
最常见的营养缺乏是膳食中铁的不足。
You can use a common electric iron used for pressing clothes.
你可以使用一个普通电熨斗来压平。
It is common knowledge that iron has little use in its pure state.
大家都知道纯态的铁几乎没有用处。
Gray cast iron is a common material for the part of the agricultural machinery.
灰铁为农机零件常用材料，磨损是灰铁零件最常见的失效形式。
Thus, iron deficiency anemia is common.
因此缺铁性贫血就较为常见。
Iron deficiency is the most common nutritional disorder in the world.
铁缺乏是全球性的营养疾病。
Iron deficiency is the most common nutritional disorder in the world.
铁缺乏是全球性的营养疾病。
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