Word · Frequency #6903
spans
持续时间；期间
spans is the plural of span.
核心释义
the complete duration of something
- 1.
从拇指到小指的全手宽度,用作非正式长度单位
The full width of an open hand from the end of the thumb to the end of the little finger used as an informal unit of length.
- 2.
某事的完整持续时间
the complete duration of something
- 3.
各种传统长度单位,尤其是9英寸的英制手宽,约为22.86厘米
Any of various traditional units of length approximating this distance, especially the English handspan of 9 inches forming 1⁄8 fathom and equivalent to 22.86 cm.
- 4.
两点之间的距离或间隔
the distance or interval between two points
- 5.
小空间或短时间
A small space or a brief portion of time.
- 6.
两个同类物品
two items of the same kind
- 7.
某物的长度部分；子序列
A portion of something by length; a subsequence.
- 8.
拱的跨度或支座之间的距离,或梁、桁架、屋顶、桥梁等的支撑之间的距离
The spread or extent of an arch or between its abutments, or of a beam, girder, truss, roof, bridge, or the like, between supports.
- 9.
两连续支撑之间的电缆、导线、绳索、链条的长度
The length of a cable, wire, rope, chain between two consecutive supports.
- 10.
两端固定的绳索,以便在中间挂钩；也指中间固定的绳索,两端可用
A rope having its ends made fast so that a purchase can be hooked to the bight; also, a rope made fast in the center so that both ends can be used.
- 11.
向量集合中所有线性组合的空间
The space of all linear combinations of vectors within a set.
- 12.
在无限数量处理器上执行并行算法所需的时间,即表示计算步骤的有向无环图的最短距离
The time required to execute a parallel algorithm on an infinite number of processors, i.e. the shortest distance across a directed acyclic graph representing the computation steps.
- 13.
飞机或鸟的翼展
wingspan of a plane or bird
间距；间隔；（短暂的）一段时间；跨度；跨距；一拃（拇指尖到小指尖的距离）；一对；一双；按长度划分的一段；子序列
用法In use
The span of the meeting was just thirty minutes.
用法提示：这里 span 作名词，表示一段持续时间。
Children's attention spans are usually short.
用法提示：这里 span 用复数形式，表示注意力持续的时间。
In a five-year span, the town built three new schools.
用法提示：这里 span 用于介词短语中，指一段时间。
the job was finished in the span of an hour
in the span of + time
强调某事在某段完整时间内发生或完成，时间通常较短。
In the span of a single week, she learned to swim.
在短短一周之内，她学会了游泳。
over a span of + time
相关词与表达Connections
搭配Collocations
- attention span
- 注意力持续时间；专注时长
- Teenagers have a longer attention span when they are interested in a topic.青少年在感兴趣的话题上注意力持续时间更长。
- life span
- 寿命；存在时间
- The life span of a housefly is short.苍蝇的寿命很短。
- time span
- 时间跨度；一段时间
- The festival was held over a time span of two weeks.这个节日的活动时间跨度长达两周。
- bridge span
- 桥跨；桥梁的跨距
- Engineers are inspecting each bridge span.工程师正在检查每一段桥跨。
- hand span
- 一掌距；一拃
学习提示Learner notes
记忆技巧Memory Tip
sp- 开头让人想到 spread（展开）：手撑开是 span（指距），时间展开也是 span（期间）。
语境与语域Context & Register
语域：neutral 常见场景：时间与日程安排、距离与范围描述、工程与建筑讨论 作名词时，span 通常指时间或空间上的“跨度/持续长度”，语气中性，正式与非正式场合都可用；在书面说明、报告等语境中尤其常见。
语法说明Grammar Note
可数名词，常与 of 或 between 连用表示时间或距离的范围
发音与拼写Pronunciation & Spelling
These words rhyme with span (/spæn/): man, plan, can, ran, than — all end with the sound /æn/. Spa looks similar in spelling but is pronounced /spɑː/, so it does not rhyme.
用法优先级Usage priority
Collins 词频等级为 2，建议结合例句记忆，而不是只背中文释义。
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Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.