架设的英文：
span

concrete bridge erection
混凝土桥架设

reinforced concrete bridge erection
钢筋混凝土桥架设

erection of spatial grid roofstructure
网架屋盖架设

They have a revolving stage here, and it won't take long for them to put up the settings.
他们这儿有旋转舞台，架设布景不需要很长时间。

Approximately one-third of the span from the pier may be erected by the free cantilever method
大约三分之一的跨长可以由一个桥墩起靠自由悬臂的方法向前架设。

Tazieff was able to set up his camp very close to the volcano while it was erupting violently.
正当火山猛烈爆发的时候，Tazieff成功地在离火山很近的地方架设了帐篷。

By use of temporary bents, standard units 60ft (18. 3m) long can be placed over the median pier
使用临时支架，可以在中墩上架设长为60ft(18．3m)的标准构件。

They spanned windows with bricks.
他们在窗子上用砖砌了拱顶。

a memory [attention] span
记忆 [注意力] 持续的期间[时间]

span a river with a bridge
在河上架桥

He spanned his wrist.
他握住手腕部量量看有多粗。

He has a short attention span.
他的注意力持续时间短。