n. 1.一?〔手指张开时，拇指尖至小指尖的长度，通常九英寸〕。 2.(常有短的涵义的)一段时间；很小的间隔；片刻，顷刻。 3.广度，全长，从一头到一头。 4.跨度；(桥礅间的)礅距。 5.【航空】翼展；(气流)宽度。 6.【航海】跨绳。 短语和例子 the span of a man's life 一个人的一生。 the whole span of English history 英国历史的全程。 the span of memory 记忆所及。 vt. (-nn-) 1.(用拇指和小指)?，用?量。 2.(眼睛)观测，看到。 3.(记忆等)到，及。 4.横跨，跨越，(桥)跨(在河上)，架(桥在河上)弥补。 5.【航海】绑住，系住。 vi. (在水中)时浮时沉地向前游泳；(尺蠖)段段移进。 His political life spans half a century. 他的政治生涯长达半个世纪。 Imagination will span the gap in our knowledge. 想像会弥补知识的不足。 Over there is a small stream spanned by a wooden bridge. 那边有一条架着木桥的小溪。 n. 〔美，南非〕一对共轭牛，共轭马。 vt. (把两头牲畜)并排套在车上。 span1 〔古语〕 spin 的过去式。
the act of sitting or standing astride 同义词：straddle,
a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc. 同义词：bridge,
the distance or interval between two points
a unit of length based on the width of the expanded human hand (usually taken as 9 inches)
two items of the same kind 同义词：couple, pair, twosome, twain, brace, yoke, couplet, distich, duo, duet, dyad, duad,
the complete duration of something; "the job was finished in the span of an hour"
to cover or extend over an area or time period; "Rivers traverse the valley floor", "The parking lot spans 3 acres"; "The novel spans three centuries" 同义词：cross, traverse, sweep,
例句与用法
1.
His political life spans half a century . 他的政治生涯长达半个世纪。
2.
His knowledge spans many different areas . 他的知识遍及许多不同领域。
3.
The river thames is spanned by many bridges . 泰晤士河上有很多桥。
4.
A steel railway bridge spans the yalu river . 鸭绿江上有一座钢铁大桥。
5.
Normal cells show a finite life span . 正常细胞显示有限的生命期。
6.
One inch of joy surmounts grief of a span . 点滴欢乐就能克服大量的忧伤。
7.
The minimum input span available is 50c . 最小的输入间隔是50C。
8.
Imagination will span the gap in our knowledge ... 想像会弥补知识的不足。
9.
The shadow of the obelisk spanned the terrance . 方尖塔的影子落在平台上。
10.
The african continent spans the equator . 非洲大陆横跨赤道。
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