中国中铁 china railway engineering corporation ; China Railway Group ; CREC ; RAILWAY
中国中铁股份有限公司 CHINA RAILWAY GROUP ; CREC ; chin rilwy group
中铁快运 CRE ; CHINA RAILWAY EXPRESS ; China Railway Express Co
中铁杆 middle irons ; Medium iron
中铁铁路产品认证中心 CRCC ; China Railways Production Certification
中铁物流集团 CRLG
中铁快运股份有限公司 China Railway Express Co
中铁二局 China Railway Second Board ; China Railway Erju ; crec ; China Railway Erju Group Corporation
中铁隧道集团 China Railway Tunnel Group ; CRTG
血液中铁含量低会导致严重的疲劳。
毕竟，太阳中任何元素的原子，比如说铁，都比陨石标本的原子要多得多，但这两种物质中铁和硅的比例可能是可以比较的。
After all, the Sun has many more atoms of any element, say iron, than does a meteorite specimen, but the ratios of iron to silicon in the two kinds of matter might be comparable.
“利用这些信息，中心的工作人员可以控制车站的灯光和温度、监测列车的运行和处理紧急情况。”来自中铁北京局集团的朱殿平说。
"With the information, the workers in the center can control the stations' lighting and temperature, monitor trains' operation and deal with emergencies," said Zhu Dianping, from CR Beiing.
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