span
noun uk/spæn/ us/spæn/
(TIME)
[ C usually singular ]一段时间
the period of time that sometimes exists or happens
He has a short attention/concentration span. 他的注意力持续时间很短。
an average life span of 70 years 平均寿命70岁
Over a span of just three years, the new government has transformed the country's economic prospects. 仅仅3年的时间，新政府已经使该国的经济前景出现了改观。
See also: lifespan
(LENGTH)
[ C ]长度;宽度;跨度
the length of something from one end to the other
huge wings with a span of over a metre 翼展超过1米的巨型翅膀
See also: wingspan
[ C ]（桥等的）跨度，跨距，墩距
the area of a bridge, etc. between two supports
The bridge crosses the river in a single span. 河上的桥是单孔桥。
span
verb uk/spæn/ us/spæn/
(SPIN)
（spin 的过去式）
past simple of spin
(TIME)
[ T ] -nn-（时间）持续，跨越
to exist or continue for a particular length of time
Tennis has a history spanning several centuries. 网球的历史长达几个世纪。
Her acting career spanned almost six decades. 她的演艺生涯持续了近60载。
(BRIDGE)
[ T ] -nn-横跨
If a bridge spans a river, it goes from one side to the other.
An old bridge spans the river just outside the town. 一座老桥横跨在镇外的河上。
span
adjective uk/spæn/ us/spæn/
spick and span 崭新的;极整洁的，极干净的
→ spick and span informal