n.时期；跨度；间距

vt.延续；横跨；贯穿；遍及；弥补

动词spin的过去式形式.

Modern medicine has increased man's life span. 现代医学延长了人的寿命。

He has settled here for a long span of time. 他已经在这儿定居很长一段时间了。

The arch has a span of 60 meters. 拱门的跨度为60米。

The clear span of a bridge is the gap from the near edge of the next. 桥梁的净跨，是自一个桥墩的近侧边到相邻桥墩近侧边之间的间距。

The shipwrecks span nearly a century. 这些船只残骸已有近百年历史。

Little bridges span the canals. 小型的桥梁横跨在运河之上。

The gloom spans the whole novel. 阴郁的气氛贯穿着整部小说。

His knowledge spans many different areas. 他的知识遍及许多领域。

Imagination will span the gaps in our knowledge. 想像力会弥补我们知识的不足。