音标：[spæn] ；柯林斯词典等级：2 级；

n. 指距, 全长, 跨距, 一段时间, 小范围
vt. 以手指测量, 跨越, 架设, 持续

n. the complete duration of something
n. the distance or interval between two points
n. a unit of length based on the width of the expanded human hand (usually taken as 9 inches)

词型变化：现在分词 : spanning ; 过去式 : spanned ; 第三人称单数 : spans ; 名词复数形式 : spans ; 过去分词 : spanned
考试类型：[四级/六级/考研/托福/IELTS/GRE]

词性分布：

名词54%

动词46%

span的用法和样例：

例句

用作名词(n.)

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 spider has a leg span of 3 inches.这个蜘蛛的腿的长度为3英寸。
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。

用作及物动词(vt.)

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。

常见句型

用作名词(n.)

The bridge has a span of 100 meters.这座桥跨度为100米。
His span of life is near over.他的人生之路即将终结。
We should cherish our span of life.我们应当珍惜我们的人生。
The pupil's attention span was short.这个小学生的注意力持续时间很短。

词汇搭配

用作名词 (n.)

动词+～

have a span of有…长〔宽〕
lengthen〔shorten〕 the span延长〔缩短〕时间
widen the span of knowledge扩大知识面

形容词+～

brief〔short〕 span短暂的时间
whole span全长

名词+～

attention span注意力持续集中的时间
life span寿命
memory span记忆持续时间

介词+～

measure by spans用指距来量
in a span在一段时间中
100 feet in span跨距一百英尺
bridge of three spans三孔桥
over a span of在…之中

～+介词

span of a bridge桥的跨度
span of knowledge知识面
span of life寿命
span of memory记忆的广度
span of ten years十年的时间

经典引文

The top stone platform..was..about seventy spans across.
出自：I. Watson
Fairchild's finger span is such that..he can grip a basketball in his..hand.
出自：J. C. Oates
She spann'd The quick invisible strings [of the lute].
出自：Keats
How your plump arms..have dropped away! Why, I can span them!
出自：Browning

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actual measurement on the drawing

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air-sucking water ejector

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