词典释义：
the full extent of something from end to end; the amount of space that something covers
全长；跨度；范围
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a warehouse with a clear span of 28 feet. 一个跨度整整２８英尺的仓库。
the length of time for which something lasts
持续时间；一段时间
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a short concentration span .短暂的注意力集中。
the wingspan of an aircraft or a bird
飞机的翼展；鸟翼。
an arch or part of a bridge between piers or supports
桥孔；（桥墩间的）墩距。
the maximum distance between the tips of the thumb and little finger, taken as the basis of a measurement equal to 9 inches
拇指尖与小指尖之间的最大距离（常作测量的基础，等于９英寸），一掌的长度。
〈古〉 短距离；短促的时间。
(of a bridge, arch, etc.)extend from side to side of
（桥、拱等）横跨，跨越
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the stream was spanned by a narrow bridge .一座窄窄的小桥横跨在小河上。
extend across (a period of time or a range of subjects)
持续（一段时间）；包括，涉及（一系列的主题）
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their interests span almost all the conventional disciplines .他们的兴趣覆盖了几乎所有的传统科目。
cover or enclose with the length of one's hand
张开手覆盖（或环绕）；用拃（拇指与小指间最大距离）量
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her waist was slender enough for him to span with his hands .她的腰肢纤细，他用双手就可以环抱。
【航海】 跨绳。
a team of people or animals, in particular
一队人（或动物），尤指：
〈北美〉 共轭马（或骡子、公牛）。
〈南 非〉 一队包括两组（或两组以上）的共轭牛。
〈南非〉 一伙人（尤指一伙参加劳动的犯人）。
(
〈南 非，非正式〉 很多
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thanks a span. 多谢了。
〈南 非〉 给（动物）套上轭
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he spanned his donkeys to the cart. 他把驴子套在大车上。
见<Bold>SPICK AND SPAN</Bold>.
〈主古〉 <Bold>SPIN</Bold>的过去式。
"Old English, ‘distance between the tips of the thumb and little finger', of Germanic origin; reinforced in Middle English by Old French
