缺铁的特征是嫩叶的叶脉之间萎黄。
Iron deficiency is characterized by chlorosis between veins in young leaves.
第一个拥有高铁的国家是日本。
刘浩是月光镇至南京高铁的总工程师。
Liu Hao is the chief engineer of the high-speed railway connecting Moonlight Town to Nanjing.
到2020年，高铁的运行速度将比目前快180公里/小时。
By 2020, the trains will run 180 km/h faster than at present.
高铁改变生活。这就是我们一直在建设高铁的原因。
High-speed rail changes life. That is why we keep building it.
这些地区的铁含量特别低，海洋学家推测，铁的缺乏阻碍了浮游生物的繁殖。
These areas have particularly low concentrations of iron, and oceanographers hypothesize that this shortage of iron prevents plankton from thriving.
蒸汽动力和铁的结合使运输发生了革命性的变化，更加产生了更深远的影响。
Steam power and iron combined to revolutionize transport, which in turn had further implications.
大约在制铁技术传到欧洲的同时，西非的森林和大草原上也开始有了制铁的知识。
Knowledge of iron making penetrated into the forest and savannahs of West Africa at roughly the same time that iron making was reaching Europe.
例如，因为突变的基因可以提高铁的吸收效率，所以遗传性血色素沉着病突变可以保护带菌者不缺铁。
For example, the hereditary hemochromatosis mutation protects carriers from iron-deficiency because the mutated gene allows increased efficiency of iron absorption.
X物质又将它的电子转移给一种含铁的蛋白质，称为铁氧还蛋白。
Substance X, in turn, donates its electron to an iron-containing protein called ferredoxin.
维生素c有助于铁的吸收进入人体。
但是随后被证实是由于铁的氧化。
其与社会流动铁的新趋势呼应吗？
而这并不只是一个高铁的问题。
它后来成了陈列铁的博物馆。
我给你们写的是，铁的锈蚀的逆过程？
The one that I've got written down for you is it's the reverse of the rusting of iron, right?
加州高铁的投标人重温旧事。
Bidders for Californian high-speed rail may have their past raked over.
手足冰冷是缺铁的信号吗？
碳纤维比铝轻便30%，是铁的50%。
Carbon fibre is 30% lighter than aluminium and 50% lighter than steel.
不管你信不信，这也有可能是缺铁的信号。
Believe or not, it could also be the sign of an iron deficiency.
在我的反应中，铁的氧化物换作二氧化钛。
这是铁的实事——但并不是无所作为的借口。
这是铁的实事——但并不是无所作为的借口。
然而，最重要的一线希望是控制动物铁的摄入量。
The most promising line of all, though, is to control an animal's intake of iron.
他的床是铁的，长九肘，宽四肘，都是以人肘为度。
His bed was made of iron and was more than thirteen feet long and six feet wide.
我们知道铁的密度，所以你能算出质量，相信我说的。
We knew the density of steel, and so you can figure out the mass, just take my word for it.
但也有些食物会阻止铁的吸收过程，如钙的补充、茶和咖啡。
But there are foods that inhibit iron absorption such as calcium supplements tea and coffee.
但也有些食物会阻止铁的吸收过程，如钙的补充、茶和咖啡。
But there are foods that inhibit iron absorption, such as calcium supplements, tea and coffee.
但也有些食物会阻止铁的吸收过程，如钙的补充、茶和咖啡。
But there are foods that inhibit iron absorption, such as calcium supplements, tea and coffee.
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