span

名词 n. 动词 v.
中文释义
英 /spæn/|/span/    美 /spæn/|/spæːn/

英文释义

名词 n.
  1. 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. Any of various traditional units of length approximating this distance, especially the English handspan of 9 inches forming ⅛ fathom and equivalent to 22.86 cm.
  3. A small space or a brief portion of time. broadly
    — He has a short attention span and gets bored within minutes.
  4. A portion of something by length; a subsequence.
    — For example, in OpenOffice.org or Microsoft Word, each span of text can have a style that defines key characteristics about the text: • What font it uses • Whether it's normal, bolded, italicized, […]
  5. The spread or extent of an arch or between its abutments, or of a beam, girder, truss, roof, bridge, or the like, between supports.
    — The force of the explosion demolished one pair of piers and two spans of the bridge crashed down into the river on top of the barges.
  6. The length of a cable, wire, rope, chain between two consecutive supports.
  7. 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.
  8. A pair of horses or other animals driven together; usually, such a pair of horses when similar in color, form, and action. Canada,US
  9. The space of all linear combinations of vectors within a set.
  10. 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.
    — We use the term span (also called depth, or dependence depth) to refer to the number of parallel steps assuming an unbounded number of processors.
  11. wingspan of a plane or bird
动词 v.
  1. To extend across (a gap or space between two sides). transitive
    — The suspension bridge spanned the canyon.
  2. simple past of spin dated,form-of,past,uncommon
    — But when Adam delued, and Eue ſpan, VVho was then a Gentleman?
  3. To cover or extend over (an area or distance). transitive
    — The parking lot spans three acres.
  4. To extend through (a period of time). transitive
    — The novel spans three centuries.
  5. To measure by the span of the hand with the fingers extended, or with the fingers encompassing the object. transitive
    — to span a space or distance; to span a cylinder
  6. To generate an entire space by means of linear combinations.
  7. To be matched, as horses. US,dated,intransitive
  8. To fetter, as a horse; to hobble. transitive
    — We spanned the dogs high up a corrie to the south of the ridge […]

词形变化

spans plural spans present,singular,third-person spanning participle,present spanned participle,past spanned past spun alternative,common

词汇关系

衍生词
arm span attention span clearspan cospan drawspan endspan eyespan forspan gerospan handspan healthspan inspan knot span legspan life span lifespan lifting span linear span linkspan long-span mainspan makespan memory span midspan outspan overspan palmspan span block span counter span iron spank spanless spannable spanned → unspanned spanner spanning → multi- overspanning span of control span roof span shackle Spansule spanwise spanworm spick-and-span subspan supraspan tetraspan timespan time-span reduction wakespan widespan wingspan
相关词
spang spank yepsen chord

词源

词源 1
Etymology tree
Proto-Indo-European *(s)pend-der.
Proto-Germanic *spannō
Old English spann
Middle English spanne
English span
From Middle English spanne, from Old English spann, from Proto-Germanic *spannō (“span, handbreadth”), from Proto-Indo-European *(s)pend- (“to stretch”).
Cognate with Dutch span, spanne, German Spanne. The sense “pair of horses” is probably from Old English ġespan, ġespann (“a joining; a fastening together; clasp; yoke”), from Proto-West Germanic [Term?]. Cognate with Dutch gespan, German Gespann.
词源 2
From Middle English spannen, from Old English spannan, from Proto-Germanic *spannaną (“to stretch, span”). Cognate with German spannen, Dutch spannen.
词源 3
From Middle English span, from Old English spann, from Proto-Germanic *spann, first and third person singular preterit indicative of Proto-Germanic *spinnaną (“to spin”).
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