使观众通过观看和操作沙盘了解铁路交通运输的有关知识。
Here visitors gain knowledge of railway transportation by watching operations on a sand table.
使观众通过观看和操作沙盘了解铁路交通运输的有关知识。
This display allows visitors to gain knowledge relevant to railway transportation through watching the operations on a sand table.
美国国内未加工钢铁产量较去年下降47%；五月铁路交通运输量几乎比一年前水平下降四分之一。
American raw domestic steel production is down 47% year on year; railway traffic in May was almost a quarter below its level of a year earlier.
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